Primary surgical lesions of the duodenum.
D000236:Adenoma / Q000601:surgery; D000328:Adult; D000368:Aged; D004379:Duodenal Neoplasms / Q000601:surgery*; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000601:surgery*; D008297:Male; D008875:Middle Aged