[Case of beniign tumor of the duodenal bulb found at stomach mass screening].
D004379:Duodenal Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D008067:Lipoma / Q000000981:diagnostic imaging*; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging