title: Unusual gas shadow in pelvis of asymptomatic patient.
mesh_terms: D004106:Dilatation / Q000295:instrumentation; D012734:Disorders of Sex Development; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000000981:diagnostic imaging*; D011182:Postoperative Care; D011859:Radiography; D014189:Transsexualism / Q000000981:diagnostic imaging* / Q000601:surgery; D014621:Vagina / Q000601:surgery