Vaginal cysts: An important differential diagnosis in the anterior compartment.

Introduction: Benign anterior-vaginal-wall cysts (0.5-1% prevalence) often mimic other structures (e.g. cystoceles). No algorithm for their diagnosis, treatment, recurrence or complication prediction can be derived from existing data. Careful preoperative diagnosis can minimize intraoperative surprises and complications due to differences in cyst origin.

Methods: This retrospective study was performed with data from consecutive patients with anterior vaginal cysts who underwent surgery at the Pelvic Floor Centre, University Women's Hospital of Jena, within a period of 7 years. Data on patient age, symptoms, history of previous surgery, lesion characteristics, preoperative imaging findings, surgeries, postoperative stays, complications and histological and microbiological findings were collected.

Results: Out of 797 consecutive anterior vaginal prolapse repairs 19 (2.4%) anterior vaginal cystic lesions were found, mean age 47 [standard deviation (SD) 14, range 22-72] years. Symptoms reported were pressure (58%), voiding dysfunction (26%), dyspareunia (5%) and inflammation signs (37%); 26% of cases were asymptomatic. Two patients had received prolapse pessary treatment before. Two patients had history of previous vaginal surgery. Five cases were diagnosed preoperatively by ultrasound. Cysts were located on the medial anterior vaginal wall (42%), suburethral (42%) and the vaginal apex (16%). The mean lesion size was 2.6 (SD 0.9) cm. Eleven percent of cases showed microbiological positivity. Most (89%) vaginal cysts were excised; 11% were fenestrated, biopsied and drained. Twenty-six percent of patients underwent outpatient procedures; for inpatient procedures, the median stay was 2.7 days. Postoperative hemorrhage with no transfusion requirement occurred in one patient. All lesions were benign.

Conclusions: Anterior-compartment vaginal cysts can be found incidentally during pelvic organ prolapse assessment and surgery, as they can mimic anterior-vaginal-wall prolapse. In this cohort, all excised lesions were benign.