Perianal endometriosis: a case report

Endometriosis lesions are commonly found within the pelvic cavity, while extrapelvic endometriosis is relatively rare. Perianal endometriosis is a particularly uncommon condition that is prone to misdiagnosis, and surgical excision is the preferred treatment approach. Our team encountered a young patient with perianal endometriosis who suffered a perineal laceration in vaginal delivery for one female baby. At presentation, the patient manifested with a perianal mass accompanied by cyclic pain. The patient did not receive specialized diagnosis and treatment from the department of gynecology, and the perianal lesion slowly regressed to a point where it was no longer visible to the naked eye after another pregnancy and cesarean delivery for one male baby. This article reports the patient’s diagnosis and treatment along with follow-up results, aiming to share our experience with colleagues.