Postoperative complications and recurrence rates after rectal prolapse surgery versus combined rectal prolapse and pelvic organ prolapse surgery

Introduction and hypothesis Our primary objectives were to compare < 30-day postoperative complications and RP recurrence rates after RP-only surgery and combined surgery. Our secondary objectives were to determine preoperative predictors of < 30-day complications and RP recurrence. Methods A prospective IRB-approved cohort study was performed at a single tertiary care center from 2017 to 2020. Female patients with symptomatic RP underwent either RP-only surgery or combined surgery based on the discretion of the colorectal and FPMRS surgeons. Primary outcome measures were < 30-day complications separated into Clavien-Dindo (CD) classes and rectal prolapse on physical examination. Results Seventy women had RP-only surgery and 45 had combined surgery with a mean follow-up time of 208 days. Sixty-eight percent underwent abdominal RP repair, and 32% underwent perineal RP repair. Twenty percent had one or more complications, 14% in the RP-only group and 29% in the combined surgery group (p = 0.06). On multivariate analysis, combined surgery patients had a 30% increased risk of complications compared to RP-only surgery patients (RR = 1.3). Most of these complications were minor (14/17, 82.4%) and categorized as CD I or II, including urinary retention and UTI. Twelve percent of this cohort had RP recurrence, 11% in the RP-only group and 13% in the combined surgery group (p = 0.76). Preoperative risk factors for RP recurrence included a primary complaint of rectal bleeding (RR 5.5) and reporting stools consistent with Bristol Stool Scale of 1 (RR 2.1). Conclusion Patients undergoing combined RP + POP surgery had a higher risk of complications and equivalent RP recurrence rates compared to patients undergoing RP-only surgery.