Unusual features of primary duodenal cancer.
D000126:Achlorhydria / Q000209:etiology; D000368:Aged; D002446:Celiac Disease / Q000209:etiology; D004379:Duodenal Neoplasms / Q000150:complications*; D004380:Duodenal Obstruction / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D011504:Protein-Losing Enteropathies / Q000209:etiology; D011859:Radiography