title: Mass simulating fetal head in pelvis of a 68-year-old man.
mesh_terms: D000368:Aged; D000388:Air; D003937:Diagnosis, Differential; D006554:Hernia, Umbilical / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D010388:Pelvis / Q000000981:diagnostic imaging*; D010529:Peritoneal Cavity; D011859:Radiography