Villous adenoma of the ampulla of Vater Which is sometimes the cause of extrahepatic obstructive jaudice is uncommon disease. But they are important in spite of their rarity, because of frequent malignant change in the tumor as a focal or an
occult
tumor. Recently, the early diagnosis of ampullary tumors has become possible ude to the wide application of fiberoptic endoscopy and increasing knowledge about the ampullary tumors.
Although the biopsies were taken during the endoscopy, sometimes one might miss the area of malignant degeneration. But, it could increase the diagnostic accuracy by performing a biopsy at the highly suspected site of malignancy, like our case in
whicil
fixed and discolored areas in the lesion were biopsied. So we recommed an affressive endoscopic study and hypotoic duodenogram.
Even though it is diagnosed as benign, and can be treated with endoscopic polypectomy, but we recommend the complete resection of the tumor because of high incidence of recurrence and malignant transformation.
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