Abdominal Wall Endometrioma after Cesarean Section: Report of a Case

Endometrioma, ectopic endometrial tissue, usually occurs in the pelvis. Endometrioma in the abdominal wall associated with abdominal wall endometrioma having received cesarean section 4 years before. The endometrioma presented as a painful mass in the lower abdominal wall with the size fluctuating with her menstruation cycle. Imaging study revealed a heterogeneous mass in the rectus abdominis muscle. Sonography-guided biopsy revealed an endometrioma. Wide surgical excision was performed and the patient recovered smoothly. Abdominal wall endometrioma is difficult to be diagnosed preoperatively and should be kept in mind in cases with previous cesarean section. The treatment of abdominal wall endometrioma is complete surgical excision to prevent recurrence.