Long-term Curvature Deformity Characterization in Men Previously Treated With Collagenase Clostridium Histolyticum for Peyronie's Disease, Subgrouped by Penile Plaque Calcification.

Objective: To examine the long-term (5-year) efficacy and safety of collagenase clostridium histolyticum (CCH) therapy in men with Peyronie's disease and varying degrees of plaque calcification.

Materials And Methods: CCH-treated adult men from the 12-month Investigation for Maximal Peyronie's Reduction Efficacy and Safety Studies I/II or 9-month open-label studies were eligible. Degree of plaque calcification (no calcification, noncontiguous stippled calcification, or calcification that did not interfere with CCH injection) was determined by penile x-ray or ultrasound. Penile curvature deformity and Peyronie's Disease Questionnaire responses were assessed annually for up to 5 years, with ≥6 months between consecutive visits.

Results: For no calcification group, from baseline to last (Reference) visit during the prior studies (n = 160), mean penile curvature improved by 20.9° ± 16.3° (39.3%) with CCH. Similar improvements with CCH from baseline to Reference were observed in stippled calcification (n = 27; improvement of 24.1° ± 20.2° [42.7%]) and calcification (n = 27; improvement of 21.7° ± 14.8° [43.3%]) subgroups. At Year 5 follow-up in no calcification group (n = 119), an additional 10.0% improvement in mean penile curvature vs Reference (4.3°) occurred. Penile curvature improvements seen at Reference in stippled calcification and calcification groups were maintained through Year 5. Additional numeric improvements in 3 Peyronie's Disease Questionnaire domains were observed at Year 5 visit vs baseline scores. No long-term safety issues were identified.

Conclusion: This first report of long-term (5-year) CCH clinical trial outcomes in a population with penile plaque calcification demonstrates that nonsurgical intralesional CCH therapy is an appropriate Peyronie's disease treatment in men with penile plaque calcification that is stippled or does not impede CCH injection.