Abdominal Wall Endometriosis Diagnosed by Fine Needle Aspiration: A Report of Two Cases

Abdominal wall endometriosis is usually preceded by obstetrical operations and occasionally can be spontaneous. The diagnosis can be suspected clinically when there is systemic endometriosis or cyclical pain; otherwise it is difficult to differentiate it from other abdominal tumors and non-neoplastic conditions. Fine needle aspiration is an extremely valuable and safe tool for pre-operative evaluation of abdominal wall endometriosis, as it usually presents as a cutaneous/ subcutaneous mass. We are presenting two cases of abdominal wall endometriosis. One was associated with systemic endometriosis and the second was spontaneous. A histological confirmation was present in both cases. The reported cases emphasize the need to include endometriosis in the differential diagnosis of abdominal wall mass in a female and to describe the cytological features of endometriosis as well as the common pitfalls such as other benign and malignant abdominal wall tumors.