Atypical vaginal location of endometriosis following repeated urogynaecological surgery

We outline a case of vaginal endometriosis in scar tissue located in the distal part of the anterior vaginal wall close to the urethra following repeated urogynaecological surgery. Our case presents a 45-year-old woman diagnosed with pelvic endometriosis in her youth. She underwent several vaginal surgeries due to pelvic organ prolapse, symptoms of stress incontinence and decreased urinary flow. One year after her most recent vaginal surgery, she developed a tender lump in the lower part of the anterior vaginal wall. A urethral diverticulum was suspected, but a diagnostic puncture and biopsy unexpectedly showed histologically verified endometriosis. As the cyst recurred, surgical excision of all visible endometriosis tissue was performed. After 3 years of follow-up, the patient remained without recurrence. This case illustrates the risk of atypical implantation of endometriosis related to repeated urogynaecological surgery and that treatment requires surgery with thorough removal of all visible tissues.