In a 50-year-old man with intermittent left-sided penile pain during erection and a mild penile curvature, what are the next steps in evaluation and management?

Peyronie's Disease: Evaluation and Management

This presentation is consistent with active-phase Peyronie's disease, and you should initiate a thorough history and physical examination, followed by an in-office intracavernosal injection test to objectively document the curvature and assess erectile function, then begin conservative management with daily tadalafil 5 mg and NSAIDs for pain control while counseling the patient about the natural history and treatment options. 1, 2

Initial Diagnostic Approach

Clinical Assessment

• Document the complete symptom profile: onset timing, presence of penile pain (especially with erection), degree of curvature, ability to achieve penetration, any palpable plaques or nodules, and impact on sexual function 2
• Perform a detailed genital examination: stretch and palpate the flaccid penis to identify any palpable abnormalities, though plaques may not be evident in early active disease 2
• Distinguish disease phase: The presence of intermittent pain with erection indicates active disease, which is characterized by dynamic, changing symptoms and may show progressive deformity 1, 2

Objective Curvature Documentation

• Perform an in-office intracavernosal injection (ICI) test prior to any invasive intervention to objectively measure the degree of curvature, assess plaque characteristics, and evaluate erectile function 2
• This is the gold standard for measuring penile deformity, as patient self-report and home photography significantly underestimate curvature compared to ICI-induced erection 3
• Consider adding duplex Doppler ultrasound to differentiate calcified from non-calcified plaques and assess vascular integrity 2

Management Strategy for Active Disease

First-Line Conservative Treatment

For active-phase disease with pain and mild curvature, medical management is appropriate:

• Daily tadalafil 5 mg is recommended as it demonstrates lower curvature progression rates, improved symptoms versus controls, and may reduce collagen deposition 1
• NSAIDs for penile pain management during the active phase 1
• Reassure the patient that Peyronie's disease does not lead to malignancy and discuss the natural history, including that some patients may experience spontaneous improvement 1

Treatments to AVOID

• Do not prescribe vitamin E, pentoxifylline, tamoxifen, potassium para-aminobenzoate (Potaba), omega-3 fatty acids, or oral combination therapies, as these lack proven efficacy and may delay more effective interventions 1
• Despite widespread historical use (70% of urologists previously prescribed vitamin E), these oral agents have failed to show consistent benefit in placebo-controlled studies 4, 5

Emerging Conservative Options

• Penile traction therapy (PTT) shows promise for active-phase disease, with one prospective controlled trial demonstrating mean curvature reduction from 33° to 13° at 9 months, pain reduction, and improvement in erectile function 6
• PTT requires extended daily use (2-8 hours) but appears safe with no serious adverse effects 1
• Low-intensity extracorporeal shockwave therapy (LI-ESWT) may provide pain relief but does not affect curvature or plaque size 1

Follow-Up and Monitoring

Observation Period

• Monitor for 3-6 months to determine if the disease stabilizes, progresses, or improves 1, 2
• Active disease typically evolves over 6-18 months before stabilizing 4
• Serial assessments should use the same measurement method (preferably ICI) for accurate comparison 3

Criteria for Stable Disease

Stable disease is defined as clinically unchanged symptoms for at least 3 months, with minimal or absent pain, and stable curvature 2

When to Consider Advanced Interventions

Intralesional Therapy

If conservative management fails and disease remains active, consider intralesional injections (though collagenase of Clostridium histolyticum has been withdrawn from the European market) 1

Surgical Intervention

Surgery is indicated only when:

• Conservative treatments have failed after approximately 1 year 4
• Disease has been stable for 3-6 months 1, 7
• The patient cannot perform satisfactory sexual intercourse 4

Surgical options depend on severity:

• Tunical shortening (plication) for curvature <60° with preserved erectile function 1, 7
• Tunical lengthening with grafting for severe curvature >60°, complex deformities, or significant shortening 1
• Penile prosthesis implantation for concurrent erectile dysfunction unresponsive to pharmacotherapy 7, 5

Critical Pitfalls to Avoid

• Do not delay objective measurement: Patient-reported curvature differs significantly from measured ICI-assisted curvature, particularly in men with concurrent erectile dysfunction 3
• Do not prescribe ineffective oral therapies: This wastes time during the active phase when more effective interventions could be initiated 1
• Do not rush to surgery: Operate only after confirming disease stability for 3-6 months, as premature surgery may require revision if disease progresses 1, 2
• Ensure appropriate expertise: Only evaluate and treat Peyronie's disease if you have the experience and diagnostic tools (including ICI capability) to appropriately manage the condition 2