THE NEW ZEALAND MEDICAL JOURNAL

A fit and well 29-year-old presented with worsening catamenial right inguinal pain of 4 months duration. She had undergone six previous laparoscopies for pelvic endometriosis, most recently in 2006 in addition to a previous laparoscopic ventrosuspension (plication of round ligaments). Examination revealed exquisite tenderness over the right inguinal canal; no masses were palpable. Urine and blood tests were unremarkable including a negative pregnancy test. A magnetic resonance imaging (MRI) scan was performed (Figure 1) and the patient underwent excision of the lesion under general anaesthetic (Figure 2). Histology is shown in Figure 3.