[Malignant change of duodenal adenoma--a case report and review of the literature].
A 69-year-old woman with a large crater-forming carcinoma of the duodenal bulbus which was associated with a prominent tumor of tubulovillous adenoma in immediate proximity is reported. Histologically, an adenoma-carcinoma sequence was strongly suggested. A review of the literature from both Japan and other countries, after reclassification of histologic patterns, suggested that tubulovillous adenoma in the duodenum may be predominant as compared with that of the colon.
D000236:Adenoma / Q000473:pathology*; D004379:Duodenal Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged