Peyronie Disease
Formation of scar tissue inside the penis leading to painful erections and significant penile curvature.
Emergency Management: Corporal rupture secondary to collagenase injection therapy requires immediate surgical repair to preserve erectile function.
Peyronie disease is an acquired, localized fibrotic disorder of the tunica albuginea of the penis. It results in the formation of inelastic fibrous plaques, causing penile deformity, curvature, shortening, and pain during erection, which often leads to sexual dysfunction.
Detailed Overview
The condition occurs in two phases. The acute (inflammatory) phase is characterized by penile pain (especially during erection), progressive curvature, and soft nodule formation. This phase lasts 12-18 months. The chronic (stable) phase is defined by the cessation of pain, stabilization of the curvature, and calcification of the plaque. The disease is believed to be an aberrant wound-healing response to microtrauma sustained during sexual intercourse in genetically susceptible individuals. It can severely impact a patient's psychological well-being and intimate relationships.
Epidemiology & Demographics
Prevalence is estimated at 3-9% of adult men, though it is likely underreported due to embarrassment. Most common between ages 50 and 60. Rarely occurs in men under 40.
Etiological Mechanism
The exact etiology is multifactorial, involving genetic predisposition, trauma, and aberrant tissue healing. There is a strong association with other superficial fibromatoses, particularly Dupuytren's contracture (palmar fibromatosis), which occurs in up to 20% of men with Peyronie disease.
Primary Causes
Repeated subclinical microvascular trauma to the tunica albuginea during sexual intercourse or minor pelvic trauma. This leads to extravasation of fibrinogen and trapping of fibrin, which stimulates fibroblasts and triggers an excessive fibrotic cascade.
Trauma causes delamination of the tunica albuginea, leading to a microhematoma. Inflammatory cytokines, particularly Transforming Growth Factor-beta 1 (TGF-β1), are upregulated. TGF-β1 drives the excessive conversion of fibroblasts into myofibroblasts, which deposit dense, disorganized bundles of collagen (type I and III) and elastin. This localized plaque prevents symmetric expansion of the corpora cavernosa during an erection, causing the penis to bend toward the plaque. Eventually, the plaque may undergo dystrophic calcification.
Diagnostic Criteria & Guidelines
Clinical diagnosis based on history (painful erections, acquired curvature) and physical examination (palpable plaque). To determine treatment, the degree of curvature must be objectively assessed, usually with photographs taken by the patient or by inducing an artificial erection in the clinic using intracavernosal injection of a vasoactive agent.
Intralesional injections of Collagenase clostridium histolyticum (Xiaflex). FDA-approved for men with stable phase disease, a palpable plaque, and curvature >30 degrees. Protocol involves 2 injections per cycle separated by 1-3 days, followed by penile modeling exercises. Up to 4 cycles. Oral NSAIDs are used for pain management in the acute phase.
Second-Line & Adjunctive Therapy
Intralesional Interferon alfa-2b or Verapamil (off-label). Penile traction therapy (PTT) devices used daily can help preserve length and reduce curvature when combined with injections.
Surgical & Procedural Management
Indicated only in the chronic/stable phase for severe deformity preventing intercourse. Options include: 1) Tunical plication (Nesbit procedure) - sutures placed on the convex side to straighten penis (causes slight shortening). 2) Plaque incision/excision and grafting - for severe curves >60 degrees or hourglass deformities. 3) Inflatable Penile Prosthesis (IPP) placement with modeling - the gold standard if severe ED is present alongside Peyronie's.
Patient Counseling & Advice
Reassure the patient that the condition is benign and not related to cancer. Educate them on the natural history: pain typically resolves on its own, but the curvature usually stabilizes and rarely improves spontaneously. Emphasize that surgical options are highly effective but must wait until the disease has been stable for at least 6 months.
Follow-Up & Monitoring Schedule
Assess every 3-6 months during the acute phase to monitor progression and pain. During injection therapy, monitor for signs of corporal rupture.
Preventive Strategies
No definitive prevention. Optimizing erectile function (e.g., using PDE5 inhibitors like sildenafil if early ED is present) can prevent the buckling trauma that initiates the disease.
Spontaneous resolution of curvature occurs in less than 12% of men. With treatment (Xiaflex or surgery), over 70% achieve sufficient straightening to resume satisfactory intercourse.