(159) The Discontinue Rate with Collagenase Clostridium Histolyticum for Peyronie’s Disease in a High-Volume Practice is Unexpectedly High: Identifying Opportunities for Patient Care Improvement

Abstract

Abstract Introduction Collagenase Clostridium Histolyticum (CCH) is an FDA-approved treatment for Peyronie’s Disease (PD). Based on phase-3 trials, the recommended treatment course consists of 8-injections over the course of roughly 18-20 weeks. While its efficacy has been established, less is known about patient-specific reasons for electing to discontinue CCH injection therapy. Objective To evaluate patient-reported factors associated with premature CCH discontinuation. Methods We queried a database of all patients (n=406) who underwent CCH at a single institution from 2014-2021. Patients who did not complete the recommended 8 injections were identified, and a detailed review was undertaken to determine causes of discontinuation. Patients were excluded from our analysis for the following reasons: deceased at the time of chart review, declined to participate, or could not be reached in 3 phone calls. Results Out of 406 patients who underwent Xiaflex treatment at our single institution, 133 did not complete 8 injections (32.8%). The mean number of CCH injections was 4.42 (SD 1.65). The most common reasons for discontinuing Xiaflex were satisfactory curve reduction (27%), unsatisfactory curve reduction (21%), bothersome side effect (15%), and decision to pursue surgery (12%) [Figure 1]. Other less common reasons included other health concerns, pausing treatments due to the Covid-19 pandemic, high treatment cost, transferring care elsewhere, and lack of awareness that more injections were indicated. Conclusions In our single institution study, we find that nearly 1/3 of patients who begin Xiaflex injections will not complete the full recommended treatment course. Understanding the reasons for discontinuation can help providers better stratify patients for Xiaflex treatment versus other modalities. In addition, given previous studies that indicate that 2/3 of men who fail to achieve a 20% curve reduction after their first 4 injections will go on to achieve this curve reduction after their final 4 injections, our data points to the potential impact of improved patient education for the 21% of individuals who discontinue due to unsatisfactory curve reduction (Alom et al 2021). Disclosure No