Intra-ampullary papillary-tubular neoplasm combined with ampullary neuroendocrine carcinoma: A case report

Figure 2 Combined intra-ampullary papillary-tubular neoplasm and neuroendocrine carcinoma. A: Section through the ampulla of Vater revealing a well-demarcated tumor localized to the area; B: Low power magnification depicting a well-delineated non-invasive tumor composed predominantly of papillary structures; C: Papillary structures are lined by a pseudostratified mildly atypical epithelium; D: Higher magnification revealing areas of high-grade dysplasia.