Andrology: Peyronie Disease

Dr. Pinnamaneni Sumanth Eswar

Audio by Paper2Audio.

Sub-Chapter 1 — Definition, Anatomy & Etiopathogenesis

Table summary: A guide for answering a repeated 30-mark exam question on the etiopathogenesis and management of Peyronie's disease from August 2018 and August 2021. The recommended answer structure follows a progression from definition and anatomic basis to etiopathogenesis, clinical features, evaluation, and management, specifically detailing medical and surgical techniques.

Definition

The 2015 A.U.A Guideline defines Peyronie disease (P.D) as an acquired penile abnormality characterized by fibrosis of the tunica albuginea, which may be accompanied by pain, deformity, erectile dysfunction, and/or distress. It was first called induratio penis plastica, later renamed after Francois Gigot de la Peyronie, who in 1743 was the first to properly describe and offer treatment for the condition.

Table summary: Four common myths regarding Peyronie's disease to contradict in exam answers. First, it is not rare, with prevalence estimates between 3 and 20 percent, and even higher in those with ED or diabetes. Second, it does not usually resolve spontaneously; full resolution is rare and up to 50 percent of untreated men worsen within 12 to 18 months. Third, it is not exclusive to middle-aged men, appearing in patients from their teens to their late 70s. Finally, plaque calcification is not proof of mature or burned out disease, as it can occur early and indicates a specific genetic subtype involving osteoblastic activation rather than just chronicity.

Anatomic Basis — Why the Tunica Albuginea's Structure Predicts Where and How P.D Deforms the Penis

You cannot explain P.D's characteristic dorsal curvature without first re-deriving the tunical anatomy, because the deformity pattern is a direct mechanical consequence of where the tunica is structurally weakest. The tunica albuginea is a multilayered, predominantly type I collagen structure with an inner circular layer and an outer longitudinal layer, interlaced with elastin and separated by an incomplete intercavernosal septum. This septum anchors into the inner circular layer and is structurally essential — computer modelling shows that without it, the stress of a full erection in one contiguous corporal body would be enough to rupture the tunica outright. The tunica is further reinforced by intracavernous pillars anchoring it across the corpora at the 2 to 6 and 10 to 6 o'clock positions, with finer pillars at 5 and 7 o'clock.

Table summary: The anatomical basis for dorsal plaque predominance and surgical strategy in Peyronie's disease. Dorsal plaques occur in 60 to 70 percent of cases because the outer longitudinal layer is thinnest at the 3 and 9 o'clock positions and absent between 5 and 7 o'clock, causing the dorsal aspect to buckle under mechanical stress. Septal anchor sites are identified as the primary trigger for the condition due to their susceptibility to microvascular trauma and tunical delamination. Consequently, surgical excision for lateral curvature requires extending through the dorsal septum to address the true anchor point of the scar and prevent residual curvature.

Table summary: The tunica is composed predominantly of type I collagen with interlaced elastin and inner circular plus outer longitudinal layers, measuring 1.5 to 3.0 mm in thickness depending on the circumferential position. Peyronie plaque typically occurs 60 to 70 percent dorsally and is associated with the septum. Histologically, this plaque consists of disorganized collagen fibrils and decreased, disorganized elastin, which leads to asymmetric corporal expansion and deviation toward the affected side. In contrast, a circumferential plaque produces an hourglass deformity.

Campbell figure 76.2 — Cross-sectional anatomy of the penis — the tunica albuginea's inner circular and outer longitudinal layers, the intercavernosal septum, and its anchoring pillars.

Figure 76.2 summary: An anatomical cross-section illustration of a human digit showing the internal structure. The image depicts the bone divided into two distinct zones: a left side showing porous, red cancellous bone and a right side showing a hollow medullary cavity. Surrounding the bone is a layer of cortical bone and soft tissue, with a blood vessel and nerve bundle visible at the bottom center.

Etiopathogenesis — the trauma-plus-susceptibility model

P.D is best understood as an Acquired Wound-healing Disorder of the tunica albuginea: an injury (usually microtrauma) activates an abnormal wound-healing response in a susceptible individual, producing an inelastic scar that — critically — never undergoes the normal remodelling that closes out ordinary wound healing. This failure to remodel is the defining biological abnormality of P.D; the scar and its deformity simply persist.

Table summary: The four-step mechanistic process of plaque formation. It begins with mechanical injury, where high pressure during erection or trauma to the flaccid penis causes microfracture or delamination of the tunica. This leads to microhemorrhage from torn small vessels, which triggers an abnormal wound-healing cascade involving factors like TGF-beta, reactive oxygen species, and interleukins. Because this cascade is self-sustaining rather than self-limiting, it results in a failure of remodelling, where collagen deposits remain as disorganized, inelastic plaque indefinitely.

Campbell figure 76.4 — Pathogenetic mechanisms of Peyronie disease — trauma to fibrin deposition, the inflammatory cascade (T.G.F-beta1, P.D.G.F, R.O.S, N.F-k.B, i.N.O.S), excessive collagen production, and osteogenic differentiation to plaque calcification. This single diagram is the etiopathogenesis section of a 30-mark answer.

Figure 76.4 summary: A flowchart illustrating the pathophysiological pathway from penile trauma to the formation of penile plaque. The process begins with penile trauma, leading to the deposition of fibrin, which attracts inflammatory cells and platelets. These cells trigger several parallel pathways: the release of growth factors and cytokines (TGF-beta 1, FGF, PDGF, IL-1, TNF-alpha, and PAI-1), the attraction and proliferation of fibroblasts and myofibroblasts, and the generation of reactive oxygen species (ROSSs), which cause oxidative stress. These events converge to cause the excessive production of collagen and the activation of NF-kappaB. NF-kappaB increases nitric oxide (NO) via iNOS, leading to nitrosative stress. Ultimately, the combination of excessive collagen production and nitrosative stress results in penile plaque, which can further undergo osteogenic differentiation to cause plaque calcification.

: Table summary: Trauma alone is insufficient to cause Peyronie's Disease because a study of 193 penile fracture patients showed that none developed the condition. Genetic susceptibility is considered essential, as only about 30 percent of patients recall a specific traumatic event. Other contributory factors include genetic predisposition, autoimmune mechanisms, infection, and aberrant localised wound healing. Consequently, treatments for erectile dysfunction, flaccid-penis trauma, endoscopy, or catheterisation should be viewed as triggers for an underlying susceptibility rather than isolated causes.

Table summary: Carrieri et al. identified clinically significant risk factors for PD, reporting a 16-fold increase in risk following prior invasive penile procedures and a nearly 3-fold increase in risk following genital or perineal trauma.

Natural history — active phase vs stable phase

Table summary: The active phase of the condition is characterized by scar growth, progressive deformity, and various types of pain, including flaccid palpation, erection, or intercourse pain. In contrast, the stable phase shows no further progression and typically sees pain resolve, although a minority experience chronic torque pain, described as a pulling sensation on the plaque during strong erections.

This active-vs-stable distinction is not academic — it directly determines treatment timing. Surgery is reserved for Stable disease (generally defined as at least 1 year from onset and stable deformity for at least 6 months), while active-phase disease is the appropriate window for medical/intralesional therapy and pain management.

Sub-Chapter 2 — Clinical Presentation & Evaluation

Presenting symptoms

The four cardinal presenting features are penile pain, deformity in the erect state, a palpable plaque, and E.D — though not every patient has all four, and many present with a self-diagnosis of 'E.D' when the real problem is deformity-related difficulty with intromission. Curvature is the most recognisable feature, but tolerance varies: many men remain capable of intercourse with dorsal curvature up to 60 degrees, especially if gradual along the shaft, whereas ventral or lateral curvature causes more difficulty because of discomfort on intromission. Patients Routinely Overestimate their curvature — one study found 50% overestimated by an average of 20 degrees — which is exactly why objective measurement (Sub-chapter 2, below) is mandatory rather than relying on patient description alone.

Table summary: The distribution of patients by Kelami classification of curvature is led by those with mild curvature under or equal to 30 degrees at 39.5 percent, followed closely by moderate curvature between 31 and 60 degrees at 35 percent. Patients with severe curvature over 60 degrees make up 13.5 percent, while those with no curvature but hourglass deformity or unstable erection account for 12 percent.

Campbell figure 76.9 — Examples of erect penile curvature — the deformity that objective assessment must quantify, since patients overestimate by approximately 20 degrees on average.

Figure 76.9 summary: Two side-by-side photographs of a human penis showing a significant curvature. A distinct, indented band or ring is visible around the shaft, consistent with a constriction or indentation.

Campbell figure 76.5 — Dupuytren contracture — the palmar fibromatosis that shares Peyronie disease's fibrotic diathesis; always examine the hands (and ask about plantar Ledderhose disease).

Table summary: Distal softening beyond a plaque is a diagnostic puzzle because dynamic infusion cavernosometry studies show that intracorporeal pressures are equal both proximal and distal to the plaque. This indicates that distal flaccidity is not caused by a pressure gradient, but is instead attributed to site-specific venous leak or local cavernosal fibrosis extending from the plaque.

History-taking — what to specifically ask

: Key clinical elements for assessing Peyronie's Disease. The most critical predictive factor is erectile capacity, evaluated by asking the patient if their current rigidity would be adequate for penetrative sex if the penis were straight; this determines if they are steered toward plication and grafting or directly to a prosthesis. Other essential assessments include the onset, duration, and inciting event to distinguish the active phase from the stable phase, and family or personal history of other fibrotic disorders like Dupuytren contracture and Ledderhose disease. Additionally, clinicians should screen for vascular risk factors for erectile dysfunction, such as diabetes, hypertension, dyslipidaemia, and smoking. The Peyronie's Disease Questionnaire, or PDQ, is used for validation, covering psychological and physical symptoms, penile pain, and the effect of symptoms across 15 items, with scores tracked by domain rather than as a single total.

Physical examination

Table summary: Clinical examination steps for evaluating penile health. The assessment begins with a general inspection of femoral pulses, circumcision status, and flaccid penis appearance. Palpation must be performed on stretch to facilitate plaque identification, noting that plaque size measurements are unreliable for tracking treatment response due to indistinct borders and septal involvement. Stretched penile length should be measured from the pubis to the corona dorsally while pulling the glans at a 90-degree angle to ensure reproducibility and provide an objective baseline. Finally, while a rock hard plaque consistency may indicate calcification, this must be confirmed through ultrasound rather than relying on palpation alone.

Imaging and objective assessment

The 2015 A.U.A Guideline states, as Expert Opinion, that clinicians should perform an in-office intracavernosal injection (I.C.I) test, with or without duplex Doppler ultrasound, Prior to any invasive intervention — history and exam may suffice to diagnose P.D, but objective erect-state assessment is mandatory before surgery is planned.

Table summary: The clinical utility of penile duplex Doppler ultrasound, or PDDUS, in assessing erectile deformity. The procedure provides objective measurements of curvature, girth irregularity, and the hinge effect, which are more reliable than patient self-reports. It identifies calcification and corporeal fibrosis, with extensive calcification predicting a poorer response to intralesional therapy and a higher likelihood of needing a prosthesis. Additionally, PDDUS allows for the observation of erectile response to vasoactive ICI to cross-check patient reports and monitors vascular parameters like PSV, EDV, and resistive index to screen for arteriogenic or venogenic erectile dysfunction that could impact surgical candidacy.

Table summary: Patients with ventral curvature are more likely to have coexisting cavernous veno-occlusive dysfunction, which leads to worse grafting outcomes. Because of this, PDDUS-based screening before surgery is most important for this specific subgroup. While dynamic infusion cavernosometry (DICC) was historically used for preoperative venous leak assessment, it is now rarely performed because a well-done PDDUS provides comparable information with lower cost and less invasiveness.

Campbell figure 76.6 — Plaque palpation on stretch — the tunica is examined with the penis on stretch, not flaccid, to make plaque identification easier.

Figure 76.6 summary: A close-up clinical photograph showing a gloved hand retracting the foreskin of a penis to reveal a circumferential, red, inflamed band of tissue at the distal end of the prepuce, characteristic of phimosis.

Campbell figure 76.7 — Penile duplex Doppler ultrasound — plaque identified as hyperechoic structure; calcification shows posterior shadowing.

:Figure 76.7 summary: Two side-by-side ultrasound images of penile tissue. The left image shows a longitudinal view with a dark, hypoechoic area measuring 6.0 mm. The right image shows a transverse view with a different hypoechoic region and two measurements: D1 at 2.4 mm and D2 at 3.9 mm.

Campbell figure 76.8 — Plaque on stretch — clinical photograph demonstrating palpable plaque identification technique.

Figure 76.8 summary: A photograph showing the measurement of a penis using a goniometer, a specialized protractor tool, to determine the angle of curvature. A clinician wearing blue gloves holds the penis and the measuring device to assess the bend.

Plaque calcification grading (Levine classification) — directly predicts treatment pathway

Table summary: Clinical implications for plaque grades vary by size, with Grade 3 being the only stage associated with a significantly higher likelihood of proceeding to surgery. Grade 1 and Grade 2, covering extents of less than 0.3 centimeters and 0.3 to 1.5 centimeters respectively, show no increased likelihood of surgery. In contrast, Grade 3 consists of plaques greater than 1.5 centimeters in any dimension or multiple plaques greater than or equal to 1.0 centimeter; these patients are also considered poor candidates for intralesional injection because the drug cannot penetrate mineralised tissue.

Sensory testing and endocrine screening

Biothesiometry (vibratory sensation testing, using the index finger as positive control and anterior thigh as negative control) is recommended by the A.U.A P.D Guideline to establish a baseline in patients with sensory complaints, though its validity as a true surrogate for sexual sensation remains debated. A morning fasting serum testosterone is recommended for patients with P.D who Also have E.D (per the A.U.A E.D guideline) — but is Not routinely recommended for P.D patients without E.D.

Differential diagnosis

Table summary: Categories and specific conditions to exclude when diagnosing Peyronie's disease. These include congenital conditions like penile curvature, chordee without hypospadias, and epispadias with curvature; acquired non-PD conditions such as chronic inflammation and post-traumatic cavernosal fibrosis; and the rare malignant condition epithelioid sarcoma of the penis, which can mimic a focal PD lesion.

Table 76.3 summary: Key evaluation points for Peyronie's disease. The process involves a detailed history covering symptom onset, vascular risk factors for erectile dysfunction, and the patient's own estimate of deformity and erection quality. Standardized assessment includes using validated questionnaires like the PDQ to document the disease's impact. Physical examination prioritizes checking for plaque palpability during penile stretch, measuring stretched flaccid penile length, and identifying pain during palpation. For those considering surgery, penile deformity should be objectively assessed during an erection induced by a vasoactive drug ICI.

Sub-Chapter 3 — Medical (Nonsurgical) Management

Table summary: According to the 2015 AUA Guideline, every oral and topical treatment for Peyronie's disease falls into the should not offer category, as no oral agent has demonstrated clinically meaningful curvature improvement in placebo-controlled trials. The only exception for oral therapy is the use of NSAIDs for pain control. Consequently, the recommended options for active treatment are traction and intralesional injection rather than pills.

Reassurance and observation

Patients with no pain or difficulty achieving penetrative sex may need only reassurance — P.D is not life-threatening and does not become malignant. Long-term data on untreated conservative management (Ziegelmann et al.) found that at a median of 8.4 years, 64% reported penile shortening and only 12% reported improvement; 26% felt worse, 38% felt better. Nearly half had pain at onset, with 82% of those improving by a median of 12 months — but strikingly, 33% still reported pain Years after onset, including some who had No pain at initial presentation, suggesting the curved penis remains vulnerable to repeated microtrauma during intercourse.

A. Oral N.S.A.I.D's

A.U.A Expert Opinion: offer oral N.S.A.I.D's to patients with active-phase P.D who need pain management. Use a visual analog scale (V.A.S) to track pain and reassess periodically to confirm efficacy. This is the Only oral agent with a formal positive A.U.A recommendation.

B. Pentoxifylline

A methylxanthine derivative (used classically for intermittent claudication) that decreases plasma/whole-blood viscosity and suppresses erythrocyte aggregation. In P.D specifically, it blocks the T.G.F-beta1-mediated inflammatory pathway, prevents type I collagen deposition, and acts as a nonspecific phosphodiesterase inhibitor with combined anti-inflammatory and antifibrotic activity — in an animal P.D model it reduced type I collagen, alpha-smooth-muscle actin, and plaque size by 95%.

Table summary: The AUA verdict on pentoxifylline indicates that while combined data from small studies, when paired with traction, have shown reductions in plaque size and curvature, the therapy is not strongly endorsed because limited evidence leaves some uncertainty regarding its efficacy.

C. P.D.E.5 inhibitors — useful for coexisting E.D, Not for the deformity itself

By raising c.G.M.P, P.D.E 5 inhibitors can theoretically inhibit collagen synthesis and induce fibroblast/myofibroblast apoptosis, giving a plausible antifibrotic mechanism. In practice: Chung et al. treated 35 patients with an Isolated Septal Scar using tadalafil 2.5 milligrams daily for 6 months, and 24 (69%) had resolution of the septal scar — a specific, narrow indication worth remembering. However, the A.U.A Guideline explicitly states P.D.E 5 inhibitors Are recommended for treating coexisting male E.D, but are Not recommended as treatment for P.D deformity itself.

D. Intralesional injection therapy — the real first-line pharmacologic option

D.1. Collagenase Clostridium histolyticum (C.C.H / Xiaflex) — the only F.D.A-approved drug for P.D

Approved 2013. Produced by Clostridium histolyticum, C.C.H selectively degrades collagen types I and III within the plaque, despite elevated tissue inhibitors of metalloproteinases (T.I.M.P's) in P.D tissue, and increases fibroblast apoptosis.

: Table summary: Protocol parameters for the Standard of care IMPRESS trial regimen. The treatment consists of 0.58 mg CCH per injection, with two injections per cycle separated by 24 to 72 hours. Patients receive up to 4 cycles separated by 6 weeks, totaling up to 8 injections. Penile plaque modelling must be performed 24 to 72 hours after the second injection of each cycle, as combining CCH with modelling produces significantly greater curvature improvement than CCH alone. Eligible patients according to AUA guidelines have stable curvature between 30 and 90 degrees and intact erectile function. Exclusions from pivotal trials include ventral plaques, disease duration under 12 months, and extensive calcification.

Table summary: The IMPRESS I and II Phase III trials, involving 417 and 415 subjects respectively, established Collagenase Clostridium Histolyticum, or CCH, as the first FDA-approved pharmacologic therapy for Peyronie's disease. CCH demonstrated a modest incremental benefit over placebo, with a mean 34 percent improvement in curvature, a mean change of minus 17.0 degrees, compared to an 18.2 percent improvement, or minus 9.3 degrees, in the placebo group. CCH also significantly improved the PD symptom effect score. While most patients developed serum antibodies and 85 percent experienced at least one side effect, these were mostly minor bruising. Serious adverse events were rare, occurring in 0.9 percent of patients in a pooled analysis of 6 trials, with specific instances including corporal rupture in 3 patients and penile hematoma in 3 patients.

Table summary: Viva trap, or corporal penile fracture, is the most feared complication of CCH treatment. The mechanism involves the injection process weakening the corporal tunica around the plaque, which increases vulnerability to rupture during mechanical stress from modeling or intercourse. While reported rates range from 0 to 4.9 percent across studies, a pooled analysis indicates an overall rate of 0.4 percent, necessitating specific patient counseling on this risk prior to treatment.

D.2. Interferon alfa-2b

Decreases fibroblast proliferation in a dose-dependent fashion, decreases extracellular collagen production, and increases collagenase production — a mechanism directly opposing the P.D fibrotic cascade.

Table summary: A multicenter, single-blind, placebo-controlled trial by Hellstrom et al. 2006 found that intralesional interferon alfa-2b is significantly more effective than saline for treating Peyronie's disease. Among 117 patients, the interferon group experienced a mean curvature decrease of 27 percent, or 13.5 degrees, compared to only 9 percent, or 4.5 degrees, in the saline group. The interferon treatment also led to significantly greater improvements in pain resolution and plaque size and density. Reported side effects included ecchymosis, minor penile swelling, and flu-like symptoms such as fever, chills, and arthralgia, all of which resolved within 36 hours and were manageable with over-the-counter NSAIDs.

Table summary: Clinical administration guidelines for intralesional interferon alfa-2b. The standard dose is 3 x 10^6 IU administered intralesionally, following the Sokhal et al. protocol. The AUA verdict advises that clinicians may administer the treatment, provided patients are counseled on potential side effects including flu-like symptoms, sinusitis, and minor penile swelling. A practical note indicates that limited availability of interferon alfa-2b in the United States since 2022 has led to an increased reliance on verapamil as an alternative treatment.

D.3. Verapamil

A calcium channel blocker; inhibits proline incorporation into extracellular matrix protein. In vitro, verapamil inhibits Peyronie plaque fibroblast proliferation by 65% at concentrations of 100 to 1000 mcg/mL, and reduces collagen/elastin deposition and myofibroblast activity (via reduced alpha-smooth-muscle actin) in animal models.

: Table summary: Protocol parameters for verapamil treatment. The standard dose is 10 mg in 10 mL saline, though some data suggest a greater response with a 20 mL dilution. Following the original Levine protocol, injections are administered intralesionally every two weeks for 6 months. Ideal candidates are those under 40 years of age with curvature greater than 30 degrees. Poor candidates include those with ventral curvature, curvature exceeding 90 degrees, or extensive calcification due to difficulty in infiltrating the plaque.

: Table summary: Levine 1997 reported positive outcomes for intralesional verapamil injection series, with pain reduction in 97 percent, improved distal rigidity in 93 percent, subjective deformity reduction in 86 percent, improved sexual function in 72 percent, and objective curvature reduction in 54 percent, averaging a 25-degree reduction. While the author concluded verapamil was an economical and reasonably effective nonoperative option, the data is countered by Shirazi et al. 2009, a placebo-controlled study of 80 verapamil and 40 saline patients that found no significant difference versus placebo regarding pain, curvature, plaque size, or sexual dysfunction.

Table summary: In a randomized controlled trial of 50 patients by Chung et al. 2022, collagenase clostridium histolyticum, or CCH, outperformed verapamil in treating curvature. CCH achieved a greater curvature improvement of minus 28.2 plus or minus 11.5 degrees compared to minus 16.8 plus or minus 7.65 degrees for verapamil, and a higher rate of complete curvature resolution at 16 percent versus 4 percent. However, CCH was associated with more minor adverse events, including pain, swelling, and bruising. Despite this, the AUA verdict states that clinicians may offer intralesional verapamil, provided patients are counseled on injection-site side effects.

E. Penile Traction Therapy (P.T.T)

A noninvasive, first-option modality using a cradle device to apply controlled mechanical tension to the penis. Mechanistically, controlled stretch triggers mechanotransduction — mechanical stimuli converted into chemical/cellular responses — leading to collagen fibril reorientation parallel to the axis of stress, decreased myofibroblast activity (reduced alpha-smooth-muscle actin), and upregulation of matrix metalloproteinases that degrade collagen.

Table summary: A 2008 pilot study by Levine et al. established penile traction therapy as an effective monotherapy for ten patients. All ten patients showed both subjective and objective reductions in curvature, averaging a 33 percent reduction from 51 to 34 degrees. Other gains included an increase in stretched penile length of 0.5 to 2.0 centimeters, erect girth increase of 0.5 to 1.0 centimeters, correction of the hinge effect in all four affected patients, and an IIEF erectile function domain improvement from 18.3 to 23.6. No adverse events occurred, and results were maintained 6 months post-treatment.

Table summary: Practical PTT dosing for exams involves effective regimens of 2 to 8 hours daily for up to 6 months. Newer devices, such as RestoreX, use counterbending mechanisms to reduce daily application time requirements and have shown benefit as monotherapy in RCTs.

Table summary: Nonsurgical treatment options for Peyronie's disease, or PD, show that while conservative approaches like oral medications and topical therapies often yield modest or inconsistent results, specific interventions demonstrate clinical benefits. The AUA Guideline currently recommends NSAIDs solely for pain management, as no oral agent has proven effective for curvature in placebo-controlled trials. Intralesional verapamil and IFN alfa-2b may stabilize deformity during the acute phase and improve sexual function, though evidence is limited by a lack of controlled trials. CCH, or Xiaflex, serves as the first FDA-approved treatment, showing a 34 percent mean curvature reduction in phase III trials when combined with PTT, compared to 18.2 percent for placebo. Additionally, novel PTT devices such as RestoreX have shown improvements in curvature, length, and erectile function, even when used as a monotherapy.

Sub-Chapter 4 — Surgical Management I: Indications & Plication Techniques

Indications for surgery

Surgery is the gold-standard treatment for the most rapid, reliable correction of P.D deformity. Indicated when deformity precludes satisfactory intercourse, causes pain for either partner, or causes distress from the appearance of the erect penis. Formal indications (expert consensus, not formally trial-validated): disease Stable for at least 1 year from onset and unchanged for at least 6 months; deformity that compromises or prevents intercourse; and failure of conservative therapy.

Preoperative counselling — the section examiners specifically reward

P.D patients are frequently emotionally distressed, and dissatisfaction after surgery is often driven by unrealistic expectations of returning to their pre-P.D baseline appearance. A frank, shared decision-making discussion is essential, and should explicitly cover:

Table summary: Key counseling points and statistics for Peyronie's disease surgery. The goal is functional rather than perfect straightness, with success defined as residual curvature of 15 degrees or less by the EAU and 20 degrees or less by AUA and expert consensus. While persistent or recurrent curvature affects up to 16 percent of patients, most do not need reoperation. Regarding length, 70 to 80 percent of patients already have some loss from the disease process before surgery. Plication carries a higher risk of further length loss than grafting, though all techniques carry some risk, as does the risk of diminished sensation.

The surgical decision algorithm (Fig. 76.10, Levine & Larsen 2013) — reproduce this logic in your answer

Campbell figure 76.10 — Algorithm for the surgical management of Peyronie disease — the single most important figure in this chapter. Erection adequate? -> Yes: duplex U.S -> simple less than 60 to 70° = plication vs complex greater than 60 to 70° = grafting. No: -> prosthesis +/- modelling +/- incision +/- graft if defect greater than 2 centimeters.

।Figure 76.10 summary: A clinical decision flowchart for managing penile deformity based on erectile function. If erection is adequate for penetration with or without PDE5 inhibitors, the process moves to duplex ultrasonography of deformity. From there, cases are divided into simple uniplanar curves (<60-70 degrees with no hourglass or hinge) and complex multiplanar curves (>60-70 degrees, severe indentation or hourglass, or short phallus on stretch <9 cm). For simple curves, patients who accept the risk of length loss receive a plication procedure, while those who do not receive plaque incision or partial excision and grafting. For complex curves, patients who accept the risk of erectile dysfunction receive plaque incision or partial excision and grafting, while those who do not receive a penile prosthesis. If erection is not adequate, options are preprosthesis plication or a penile prosthesis. Following preprosthesis plication, if the result is not functionally straight, manual modeling is attempted. If manual modeling still does not result in a functionally straight penis, plaque incision with or without a graft is used if the defect is greater than 2 cm. If any of these steps result in a functionally straight outcome, no further measures are required.

Table summary: The single most important predictor for choosing a surgical pathway is asking the patient if their current rigidity would be adequate for penetrative sex if their penis were straight. If the patient answers yes and has mild to moderate curvature, plication is the recommended approach. If the patient answers no or is uncertain, a prosthesis is likely necessary, as correcting the curvature alone will not address the underlying issue of inadequate rigidity.

Tunical Shortening Procedures (Plication) — General Principle

The unifying principle of every plication technique: shorten the Longer (convex) side of the tunica to match the Shorter (concave, diseased) side — the opposite conceptual approach to grafting, which lengthens the short side instead. Advantages: shorter operative time, good cosmesis, minimal effect on rigidity, simplicity, safety, effective straightening. Disadvantages: further shortens the penis, does not correct an hourglass or hinge defect (may worsen it), and leaves the plaque in situ untreated.

Table summary: Three specific risk factors for unsatisfactory outcomes following a Nesbit plication procedure are impaired preoperative erectile function, penile shortening greater than 2 centimeters, and penile deformity greater than 30 degrees.

Technique 1 — Nesbit procedure (the original, 1965)

Campbell figure 76.11 — The Nesbit procedure: (A) a transverse elliptical incision of the tunica albuginea contralateral to the area of greatest curvature; (B) excision done contralateral to the curve; (C) the defect is closed transversely with permanent suture.

Figure 76.11 summary: A three-part medical line drawing illustrating a surgical procedure on a penis. Panel A shows the initial state with a small red lesion on the right side. Panel B depicts a square skin graft being harvested from the left side. Panel C shows the result after the graft has been transplanted to the right side to cover the lesion, with sutures visible on the donor site.

Table summary: The Nesbit procedure consists of three operative steps. First, the Buck fascia is elevated over the area opposite the curvature. Second, a small elliptical wedge segment of the tunica albuginea is excised at that opposite point. Finally, the resulting defect is closed transversely, typically using permanent suture, with the option of adding absorbable suture.

This is the foundational technique from which all later plication variants (Yachia, 16-dot, T.A.P) were derived.

Technique 2 — Yachia procedure (Heineke-Mikulicz principle)

Campbell figure 76.12 — The Yachia procedure: (A) a full-thickness vertical incision in the tunica contralateral to the curvature; (B) the incision is closed transversely (Heineke-Mikulicz principle); (C) no tunica is removed.

Figure 76.12 summary: A medical line drawing illustrating three stages of a surgical procedure on a penis. View A shows a single vertical incision on the right side of the shaft. View B shows a second, parallel vertical incision on the left side of the shaft. View C shows the result after the skin has been shifted and sutured, with the original right incision remaining and a horizontal suture line appearing on the left side.

: Table summary: The Yachia procedure for correcting dorsal curvature involves four operative steps. First, the area of maximum curvature is identified. Second, a short, full-thickness vertical incision of 0.5 to 1.5 centimeters is made on the ventral tunica. Third, this incision is closed transversely using a Heineke-Mikulicz-type closure to create a transverse shortening. Finally, the technique relies on incision-and-transverse-closure geometry and requires that no tunica be excised.

Table summary: A critical technical caution for the Yachia procedure states that the incision must not be too long, as closing an overly long incision transversely can excessively narrow the shaft and lead to an unstable erection. This technique is noted to have a lower risk of perceived shortening than elliptical excision techniques.

Technique 3 — 16-dot procedure (Ebbehoj/Gholami-Lue popularisation)

Campbell figure 76.13 — The dot (16-dot) procedure: the tunica is plicated with permanent suture in an extended Lembert-type fashion following a '4 dots per plication' pattern — No tunical incision. (A) Suture placement for dorsal curve; (B) suture placement for ventral curve.

Figure 76.13 summary: Two anatomical diagrams, labeled A and B, illustrate a surgical procedure on a penis. Image A shows the external view of the penile shaft with two horizontal sutures securing a tissue flap. Image B provides a deeper anatomical view, revealing the internal blue dorsal vein and yellow nerves beneath the sutures. Each main diagram is accompanied by a small inset showing a profile view of the penis with a curved arrow indicating a rotational movement of the glans.

An imbrikashun technique — no tunical incision at all, avoiding full-thickness violation of the tunica entirely. Uses permanent suture placed in an extended Lembert-type fashion following a '4 dots per plication' pattern (hence '16-dot' when 4 plication sites are used) to fold and shorten the convex side.

Table summary: Imbrication techniques are attractive because they avoid incisions, thereby eliminating risks like herniation and cicatrix contracture associated with grafting and incision techniques, though they shorten the penis and do not address the plaque itself.

Technique 4 — Tunica Albuginea Plication (T.A.P), Levine modification of Duckett-Baskin — the most detailed technique in Campbell, worth reproducing exactly

Campbell figure 76.14 — The T.A.P procedure: (A) a pair of transverse parallel partial-thickness incisions through the longitudinal fibres only; (B) the incision is 0.5 to 1.0 centimeters apart; (C) longitudinal fibres between the incisions are excised; (D) the defect is brought together transversely with permanent + absorbable suture.

: Figure 76.14 summary: A series of four line drawings (labeled B, C, and D) illustrating a surgical procedure on a penis. Drawing B shows two horizontal incisions on the left side; drawing C shows these incisions being manipulated; and drawing D shows the incisions closed with sutures.

: Table summary: The TAP procedure involves a seven-step operative process to shorten the tunica. Key steps include making a pair of transverse parallel partial-thickness incisions, 1 to 1.5 centimeters long and separated by 0.5 to 1.0 centimeters, to divide only the longitudinal fibers while leaving inner circular fibers and cavernosal tissue undisturbed to reduce the risk of postoperative ED. After excising the fibers between the incisions, the site is secured first with a single central permanent suture, using 2-0 Tevdek or 2-0 TiCron in an inverting vertical mattress fashion, and then reinforced with an absorbable 3-0 polydioxanone PDS suture in a Lembert fashion to reduce the palpability of the knots.

: Table summary: Suture specifications for a procedure using two types of stitches. The primary plicating suture uses permanent 2-0 Tevdek or 2-0 TiCron for load-bearing as an inverting vertical mattress with a buried knot. This is supplemented by a reinforcing suture using absorbable 3-0 PDS in a Lembert fashion to support the closure and reduce palpability.

Outcomes and complications of plication techniques (pooled)

Table summary: Clinical outcomes for this procedure show high efficacy with straightening success in 79 to 100 percent of patients and satisfaction rates between 65 and 100 percent. Long-term complications vary, including new ED in 0 to 38 percent, penile narrowing or indentation in up to 17 percent, and recurrent curvature greater than 30 degrees in up to 12 percent. Other risks include diminished sensation in 4 to 21 percent of patients, hematoma in up to 9 percent, phimosis in up to 5 percent, and urethral injury in less than 2 percent. A specific long-term study by Seveso et al. with a median 141-month follow-up for TAP reported complete curvature correction in 92 percent of cases, with complications such as length loss, recurrent curvature, ED, and sensory change occurring in 8 percent of patients by 10 years.

Table summary: The International Consultation on Sexual Medicine, or ICSM, states that no single plication technique is superior to others, as curvature correction is generally achievable regardless of the specific method chosen.

Table summary: AUA position on plication (2015 Guideline) states that clinicians may offer plication surgery to patients with rigidity adequate for coitus. Plication accounts for approximately half of all Peyronie's disease surgeries, and 42 out of 54 study arms report curvature improvement rates greater than 90 percent.

Sub-Chapter 5 — Surgical Management 2: Plaque Incision/Excision & Grafting

Indications — Tunical Lengthening is the opposite strategy to Plication

Where plication shortens the long side, grafting Lengthens the short (diseased) side by incising or excising the plaque and patching the resulting defect. This is indicated for greater disease complexity: curvature 60 to 70 degrees or more, shaft narrowing, hinge effect, and extensive plaque calcification. The single most important prerequisite — more important than any anatomic factor — is Strong Preoperative Erectile Function, confirmed by the same direct question used for surgical pathway selection ('would your erection be adequate if straight?'). Grafting offers a real advantage plication cannot: correcting curvature and caliber while potentially Recovering 0.5 to 3.0 centimeters of length — but at a materially higher risk of postoperative E.D than plication.

:(Table summary: Factors associated with worse postoperative erectile dysfunction after grafting. Preoperative erection quality is the dominant predictor across larger studies, with a linear relationship between preoperative and postoperative function. Other risk factors include being over 55 years old, having a PDDUS resistive index under 0.80, and having a large graft size or tunical defect. Ventral curvature is described as the highest-risk subgroup due to likely coexisting veno-occlusive dysfunction, while curvatures greater than 60 degrees correlate with the size of the needed defect.

Plaque incision vs plaque excision — same goal, different technique

Table summary: Plaque incision and grafting, or PIG, and Plaque excision and grafting, or PEG, are two approaches for curvature correction with distinct indications based on the severity of deformity. PIG involves making a modified-H or double-Y incision at the point of maximum curvature to expand the tunica without removing tissue, and it is preferred for general curvature correction where indentation is not severe. In contrast, PEG involves excising the area of maximum deformity and is preferred for severe indentation or hourglass deformities where incision alone would fail to restore normal shaft caliber.

Table summary: The historical approach of total plaque excision, referred to as the Viva trap, is now considered obsolete and harmful. While once used to cut out the disease, it resulted in unacceptably high erectile dysfunction rates due to the large graft required and disruption of the veno-occlusive mechanism. Contemporary incision and excision techniques now prioritize minimizing cavernosal tissue exposure as their primary design principle.

Graft materials — properties of the ideal graft, and current practice

The ideal graft approximates native tunica's strength and elasticity, causes minimal tissue reaction, is readily available, thin, pliable, easy to size/suture, inexpensive, infection-resistant, and preserves erectile capacity. Historic autologous options (fat, dermis, tunica vaginalis, dura mater, temporalis fascia, saphenous vein, buccal mucosa) have fallen out of favour because they require a second surgical site with its own morbidity. Synthetic Dacron/Teflon grafts are Not recommended now (infection, fibrosis risk).

Table summary: Graft materials for defect repair vary in sizing requirements and clinical outcomes, with Tutoplast processed human/bovine pericardium standing out as the most commonly used contemporary option due to its minimal contraction and strength. In contrast, Porcine small intestinal submucosa, such as Surgisis ES, requires significant oversizing by 25 percent to account for high rates of contraction, which has been linked to recurrent curvature in up to 75 percent of cases. Tachosil, a collagen fleece with tissue sealant, offers a distinct advantage by requiring no suturing and demonstrating an 85 percent success rate in one series, though locally harvested dermal grafts are specifically not recommended when used alongside penile prosthesis placement due to infection risks.

Grafting surgical technique — the full operative sequence, exactly as performed

Table summary: The operative steps for plaque incision or excision and grafting for penile curvature. The procedure begins under general anaesthesia with baseline penile length measurement and an artificial erection to assess deformity. Key steps involve a circumcising incision, degloving the penis to Buck fascia, and elevating the neurovascular bundle to expose the tunica albuginea. For dorsal or dorsolateral curvature, the surgeon must excise through the dorsal septum to address the primary scar anchor. After creating a rectangular defect and darting the corners, the surgeon measures the site and secures a graft, such as Tutoplast pericardium or porcine SIS, using 4-0 PDS sutures. A final artificial erection confirms correction, with tunical plication used if residual curvature remains. The procedure concludes by reapproximating the fascia and skin, applying a compression dressing for three days, and advising the patient to avoid submerging the wound.

Postoperative rehabilitation protocol — as important as the surgery itself

Campbell explicitly likens postoperative penile rehabilitation to rehabilitation after orthopaedic joint replacement — skipping it materially worsens outcomes.

Postoperative rehabilitation protocols for penile recovery focus on three key elements. Massage and stretch therapy begins at 2 weeks postoperatively and consists of twice-daily 5-minute sessions for 2 to 4 weeks. Nocturnal PDE5 inhibitors are recommended to support graft take, preserve cavernosal tissue, and reduce erectile dysfunction risk. Penile traction therapy starts 3 to 4 weeks after surgery, used for 3 or more hours daily for about 3 months. According to Rybak et al., patients using postoperative traction saw a length increase of 0.85 to 1.48 centimeters in plication and PEG groups, whereas those without it experienced a loss of 0.24 to 0.53 centimeters. Notably, no patient using postoperative traction reported length loss.

Outcomes and complications of grafting

Table summary: Outcomes for straightening procedures show high success rates, with satisfactory straightening occurring in 74 to 100 percent of cases, and a PIG-specific review reporting straightening in 80.0 to 96.4 percent of patients. Long-term complications include recurrent or persistent curvature at five or more years in 8 to 12 percent of cases, and erectile dysfunction at five or more years in up to 24 percent of a single-centre series. Other postoperative outcomes range from 5 to 54 percent for erectile dysfunction, 0 to 11.8 percent for the inability to achieve any erection in a PIG-specific review, and 2 to 22.5 percent for sensory changes, the vast majority of which were transient.

Table summary: The 2015 AUA Guideline on grafting for penile curvature indicates that clinicians may offer plaque incision or excision and grafting to patients who maintain adequate rigidity for coitus, either with or without pharmacotherapy or vacuum erection devices. This is classified as a moderate recommendation with evidence grade C. The guideline does not specify a preference for graft material, leaving the choice to the surgeon and patient.

Table summary: Patient selection and surgical technique are the primary determinants of postoperative erectile dysfunction risk following the use of Viva trap graft material, rather than the specific nature of the graft itself. Campbell emphasizes that minimizing cavernosal tissue trauma and assessing preoperative erectile status are more critical factors for preventing erectile dysfunction than the choice of graft material.

Sub-Chapter 6 — Surgical Management 3: Penile Prosthesis for P.D with E.D

Indications

In patients with P.D and coexisting E.D refractory to P.D.E.5 inhibitors, penile prosthesis placement is the procedure of choice — this single sentence should open any exam answer about surgical management of P.D-with-E.D. An inflatable penile prosthesis (I.P.P) is preferred over a malleable device specifically for P.D, because the pressure generated within inflatable cylinders provides superior curvature correction during intraoperative manual modelling and better girth restoration; historically, malleable pros-thee-seez in P.D were associated with narrow, cold, less natural-feeling erections. General prosthesis surgical technique (approach, infection prevention, device types) is covered in the E.D surgery chapter — this sub-chapter focuses specifically on the P.D-specific straightening manoeuvres performed At the Time of prosthesis placement.

Sequence of straightening manoeuvres — escalate only as needed

;Table summary: A three-step procedural guide for managing curvature. The process begins with manual modelling using the Wilson & Delk technique with inflatable cylinders. If curvature remains greater than 30 degrees, the surgeon proceeds to step two, which involves relaxing the tunical incision at the point of maximum curvature after elevating Buck fascia. Finally, if the resulting incisional defect exceeds 2 centimeters, step three requires grafting with a biograft, specifically pericardium or porcine SIS, to prevent prosthesis herniation or cicatrix contracture.

Table summary: Surgical preference for the timing of tunical PLICATION during prosthesis implantation. While some surgeons perform tunical PLICATION contralateral to the curvature before placing prosthesis cylinders, the authors of Campbell's prefer placing cylinders first, followed by corporotomy closure and then manual modelling.

Manual modelling technique — the exact operative steps

Table summary: The process for manual modelling with inflatable cylinders involves seven steps to correct curvature. The procedure begins with placing prosthesis cylinders via a standard penoscrotal approach, inflating them to full rigidity using a surrogate reservoir to visualize deformity, and applying shodded hemostat clamps to the tubing to protect the pump mechanism. The clinician then bends the penis opposite the curvature for 60 to 90 seconds, though less than 30 seconds may be practical. A critical hand position is required: the bending hand must be on the shaft rather than the glans to prevent urethral injury, while the other hand supports the base over the corporotomies to protect the suture line. The process of deflating, re-inflating, and repeating the bend continues until the correction is satisfactory, using a gradual rather than forceful bend to avoid tunical tearing or neurovascular bundle injury.

Table summary: Urethral injury during modelling is a recognized, specifically preventable complication. Injury from distal cylinder extrusion at the fossa navicularis occurs when the bending hand is placed on the GLANS rather than the shaft, making knowledge of this specific mechanism and the preventive hand position a key technical detail.

Table summary: Manual modelling is highly effective for straightening, with a success rate between 86 and 100 percent. This process results in rare sensory deficits and shows no demonstrated increase in the device revision rate.

Tunical incision (if modelling alone is insufficient)

Table summary: The relaxing tunical incision technique involves five key steps. First, deflate the prosthesis cylinders, then elevate Buck fascia over the area of maximum residual curvature. Third, use cautery to release or incise the tunica while preserving overlying cavernosal tissue; for Titan cylinders, cautery energy must remain below 30 watts to prevent thermal injury. Fourth, re-inflate the cylinders for final correction. Finally, if the resulting defect is larger than 2 centimeters in any dimension, it should be grafted using pericardium or porcine SIS, as locally harvested dermal grafts are not recommended due to the risk of transferring bacteria to the prosthesis.

Home modelling — a newer postoperative adjunct

Moncada et al. (2021) described a structured Home modelling protocol for patients with residual postoperative curvature less than 45 degrees after I.P.P placement with intraoperative modelling.

Table summary: Guidelines and outcomes for a postoperative protocol where patients achieved a residual curvature of 10 degrees or less in 85.5 percent of cases at 3 months and 94.7 percent at 6 months. The protocol begins 4 weeks postoperatively following in-office instruction. The technique involves full IPP inflation, a gentle bend in the direction opposite the curvature held for 30 seconds, and then deflation. This is performed in 20 minute cycles, 3 times daily, for 6 months.

The sliding technique — for patients with severe length/girth loss

For men with debilitating penile length or girth loss (severe P.D, prosthesis explant history, or post-radical-prostatectomy shortening), the Sliding Technique can be combined with prosthesis placement to restore some length and girth. Traditionally performed via a subcoronal circumcising incision with full degloving, but this approach carries ischaemic complication risk; a non-degloving Ventral incision approach has been reported with a mean length gain of 2.6 centimeters and No vascular complications, attributed to preserving the continuity of skin, dartos fascia, and the neurovascular bundle.

Table summary: Two study series on penile lengthening using a sliding technique. The Rolle et al. study involving 143 patients using a prosthesis reported an average length gain of 3.1 centimeters, with 89.2 percent satisfaction and curvature correction for all 77 affected patients. The Clavell-Hernandez and Wang study using a non-degloving ventral incision reported a slightly lower mean length gain of 2.6 centimeters.

Overall prosthesis + straightening outcomes and complications

: 4% achieved satisfactory straightening with prosthesis placement alone (no adjunct needed), 79% needed prosthesis + modelling, 4% needed tunical incision, and 12% needed incision + pericardial grafting. Importantly, adding these adjunctive manoeuvres did Not increase mechanical failure or infection rates. Overall patient satisfaction was 84%, though only 73% were specifically satisfied with curvature correction — a gap worth mentioning as evidence of the genuine difficulty of fully meeting P.D patients' expectations.

Table summary: Postoperative length loss is the most common complaint following implantation, with objectively measured decreases of 0.8 centimeters at 6 weeks, 0.75 centimeters at 6 months, and 0.74 centimeters at 1 year. To counter this, two protocols are discussed. First, a pilot study found that 3 to 4 months of daily preoperative PTT, consisting of approximately 3 hours of traction per day, prevented further loss and actually resulted in most patients gaining 0.5 to 2.0 centimeters over their pre-traction baseline. Second, a postoperative prolonged cylinder inflation protocol, which involves inflating the device for 10 to 30 minutes daily for 3 months starting 6 weeks after surgery, helps reduce residual curvature and maintain length.

Table summary: Surgical management of Peyronie's disease, or PD, centers on correcting deformity when penetrative sexual activity is compromised. For patients with satisfactory erectile function and curvature under 60 to 70 degrees without significant indentation, tunical plication is the indicated approach, with no single technique proven superior. More complex deformities in patients with strong erectile function may be treated with plaque incision or PEG. For patients with inadequate rigidity, penile prosthesis placement is the first-line surgical option. The AUA PD Guideline recommends that clinicians may offer penile prosthesis surgery to patients with PD and ED or deformity that prevents coitus, and should use an inflatable penile prosthesis, or IPP, for these cases. Intraoperative modeling, plication, or incision and grafting may be used as adjunctive measures if significant deformity remains after implant insertion. All straightening procedures carry risks, including incomplete correction, recurrent curvature, shaft shortening, diminished sensation, and ED, making careful patient selection and informed consent essential for satisfaction.

Sub-Chapter 7 — Quick Revision: Peyronie Disease

One-paragraph summary

Peyronie disease is an acquired wound-healing disorder of the tunica albuginea in which microtrauma (often to the septal anchor points, explaining dorsal predominance) triggers an abnormal, self-sustaining fibrotic cascade in a genetically susceptible individual, producing an inelastic plaque that never remodels back to normal — trauma alone is insufficient (proven by penile fracture cohorts who never develop P.D), so susceptibility is essential. Diagnosis is clinical (curvature, palpable plaque, pain, E.D) but must be objectively confirmed with penile duplex Doppler ultrasound after intracavernosal injection before any invasive treatment is planned, since patients routinely overestimate curvature. Management follows two broad tracks: nonsurgical (N.S.A.I.D's for pain — the only A.U.A-endorsed oral drug; intralesional C.C.H as the only F.D.A-approved pharmacotherapy, dosed 0.58 milligrams x2 injections per cycle x4 cycles with mandatory modelling; intralesional verapamil or interferon alfa-2b as alternatives; penile traction therapy as a genuinely effective monotherapy) and surgical (reserved for stable disease >=1 year from onset and unchanged >=6 months). Surgical choice depends on two questions: is erectile rigidity adequate, and how severe/complex is the curvature? Adequate rigidity + curvature less than 60 to 70 degrees -> plication (Nesbit, Yachia, 16-dot, or T.A.P — all roughly equivalent, shortens the long side).

Adequate rigidity + severe/complex curvature -> plaque incision or excision and grafting (lengthens the short side, higher E.D risk, needs strong preoperative erections). Inadequate rigidity, regardless of curvature -> inflatable penile prosthesis with intraoperative modelling +/- tunical incision +/- grafting for defects greater than 2 centimeters.

The complete 30-mark answer skeleton

Table summary: Clinical management and pathophysiology of Peyronie's disease. The condition is defined as an acquired penile abnormality involving fibrosis of the tunica albuginea, often presenting with pain, deformity, or erectile dysfunction. The anatomy of the tunica bilayer explains the common dorsal plaque location, while the etiopathogenesis involves trauma leading to an abnormal wound-healing cascade in susceptible individuals. Clinical evaluation includes structured history taking, the PDQ questionnaire, physical examination, and PDDUS with ICI. Nonsurgical management options include intralesional CCH, the only FDA-approved drug, alongside verapamil, interferon alfa-2b, PDE5i, and penile traction therapy. Surgical management is indicated for stable disease and varies by patient needs: plication is used for adequate rigidity and moderate curvature, grafting for severe or complex cases, and penile prosthesis for those with inadequate rigidity. Key surgical considerations include pre-operative counseling regarding length loss and recurrence, as well as specific techniques like the Nesbit or 16-dot procedure for plication and the use of pericardium or SIS grafts. Complications across all surgical techniques include potential length loss, sensory changes, and recurrent curvature, with specific risks associated with each approach.

Numbers you must be able to reproduce cold

: Peyronie's disease statistics and treatment parameters. PD prevalence ranges from 3 to 20 percent, with up to 50 percent worsening without treatment at 12 to 18 months. Risk is significantly higher following invasive penile procedures or genital trauma, with a 16-fold and 3-fold increase respectively, while trauma alone from penile fracture appears insufficient as 0 of 193 patients developed PD. Patient perception is often skewed, with 50 percent overestimating curvature by an average of 20 degrees. For medical treatments, the IMPRESS trial showed CCH provided a 34 percent curvature improvement, compared to 18.2 percent for placebo. Other doses include Interferon alfa-2b at 3 x 10^6 IU, Verapamil at 10 mg in 10 mL, and Tadalafil at 2.5 mg daily for 6 months, which resolved isolated septal scars in 69 percent of cases. Surgical criteria require stability for at least 1 year since onset and 6 months of no change, with goals of less than 20 degrees residual curvature for AUA or 15 degrees for EAU. Length loss is common, affecting 70 to 80 percent of patients before surgery, and averages around 0.7 to 0.8 centimeters after prosthesis alone. Grafting is required for defects greater than 2 centimeters, with oversizing of 10 percent for pericardium and 25 percent for SIS.

Table summary: The decision process for choosing between plication, grafting, and prosthesis begins first with an assessment of rigidity. If there is inadequate rigidity, a prosthesis is used regardless of curvature. If rigidity is sufficient, the choice depends on the severity and complexity of the curvature: plication is used for mild-moderate uniplanar cases, while grafting is used for severe, complex, or hourglass curvatures.