Rare histological subtype of invasive micropapillary carcinoma in the ampulla of Vater: A case report

Figure 1 Macroscopic appearance. A: Macroscopic appearance of the resected specimen showing an irregular papillary surface at the enlarged papilla of Vater measuring 23 mm × 10 mm. The tumor is seen extending into the dilated ampullary channel with an exophytic growth pattern; B: The cut surface of the tumor is grey to white in color.