Prevalence and outcome of urinary retention after laparoscopic surgery for severe endometriosis--does histology provide answers?

Introduction and Hypothesis: Urinary retention after radical laparoscopic surgery for severe endometriosis is a clinically relevant complication. We hypothesized a relationship between the amount of resected nerves and the occurrence of urinary retention.
Methods: We evaluated, retrospectively, a cohort of 221 patients. The expression of nerves in the resected specimens was investigated in patients with urinary retention and matched controls using standardized immunohistochemistry techniques.
Results: The prevalence of urinary retention was 4.6% (n = 10). Importantly, there was no difference between cases and controls regarding the quantity of nerves in the resected specimens. The cumulative probability of 50% to overcome urinary retention was reached after 5.6 months. Age was the main risk factor for persistent retention (40.3 years with vs. 31.6 years without, p = 0.01).
Conclusions: In older endometriosis patients, surgical radicality should be balanced against preservation of organ function. There is a fairly good chance to recover, even after 6 months, which is important for patient counseling.