A Case of Psoas Muscle Endometriosis: A Distinct Approach to Diagnosis and Management

Endometriosis is a common disease in women of childbearing age. Here, we report a case of psoas muscle endometriosis and our approach to treatment. A 28-year-old woman presented with an 8-month history of lower left abdominal and back pain. She was incorrectly diagnosed and treated for a psoas abscess at a previous hospital. Based on imaging results and previous history of severe dysmenorrhea, a diagnosis of psoas muscle endometriosis was considered. The patient underwent treatment with gonadotropin-releasing hormones and laparoscopic surgery and currently reports alleviation of symptoms. Psoas muscle endometriosis is rare, and the diagnosis can be difficult. It is important to recognize signs and symptoms to determine adequate treatment.