Ulcerogenic tumor of the duodenum.
D000328:Adult; D002276:Carcinoid Tumor / Q000150:complications*; D004379:Duodenal Neoplasms / Q000150:complications*; D004381:Duodenal Ulcer / Q000209:etiology*; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D013276:Stomach Ulcer / Q000209:etiology*; D015043:Zollinger-Ellison Syndrome / Q000150:complications*