title: Obstruction of the third portion of the duodenum.
mesh_terms: D000368:Aged; D004380:Duodenal Obstruction / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography