Small Intestinal Tumors: A Rare Case of Tubulovillous Adenoma in Duodenum

Abstract The small intestine is a relatively privileged organ; primary tumors are uncommon among malignancies of the gastrointestinal tract, with an average annual incidence rate of 9.9 per million people. Among these uncommon tumors, duodenal tumors are even rarer with an average incidence rate of 0.4% only. Histopathological examination mostly shows villous type. Tubulovillous histology is extremely rare with an incidence of less than 1% of all duodenal tumors. These tumors are either found incidentally or during screening for familial