title: The acute nonsurgical abdomen.
mesh_terms: D000006:Abdomen, Acute / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D000328:Adult; D001424:Bacterial Infections / Q000150:complications / Q000209:etiology; D006801:Humans; D008297:Male; D010538:Peritonitis / Q000175:diagnosis / Q000209:etiology / Q000276:immunology; D011446:Prospective Studies