Brunner gland adenomas.
D000236:Adenoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004378:Duodenal Diseases / Q000175:diagnosis*; D004379:Duodenal Neoplasms / Q000175:diagnosis*; D006222:Hamartoma / Q000175:diagnosis*; D006801:Humans; D006965:Hyperplasia / Q000175:diagnosis; D008297:Male; D008875:Middle Aged