title: Primary carcinoma of the duodenal bulb.
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D004379:Duodenal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D004381:Duodenal Ulcer / Q000209:etiology; D004386:Duodenum / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography