title: Endometrioma involving the perianal tissues: report of a case.
mesh_terms: D000328:Adult; D001005:Anus Neoplasms / Q000473:pathology / Q000601:surgery*; D004715:Endometriosis / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D011351:Proctoscopy; D012812:Sigmoidoscopy