Hip ganglion: case report and review of the literature.

We present an unusual case of a ganglion of the hip. The patient presented with a groin mass initially thought to be inguinal lymphadenopathy, related to a scrotal malignant melanoma excised 2 years earlier. Five similar cases have been previously reported. In all cases the pre-operative diagnosis was wrong (femoral hernia, inguinal lymphadenopathy, inguinal abscess). Only at operative exploration was the correct diagnosis made. The diagnosis of hip ganglion should be borne in mind when a patient presents with an inguinal swelling.