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  • Title: Multiple 'serrated adenocarcinomas' of the colon with a cell lineage common to metaplastic polyp and serrated adenoma. Case report of a new subtype of colonic adenocarcinoma with gastric differentiation.
    Author: Yao T, Nishiyama Ki, Oya M, Kouzuki T, Kajiwara M, Tsuneyoshi M.
    Journal: J Pathol; 2000 Mar; 190(4):444-9. PubMed ID: 10699993.
    Abstract:
    A 70-year-old woman underwent right hemicolectomy and six carcinomas were recognized in the resected colon. These carcinomas were considered to be of a cell lineage common to serrated adenoma (SA) and hyperplastic (metaplastic) polyp (H/MP), because of the occurrence of multiple SAs and H/MPs around the carcinomas, as well as the co-existence of SA and H/MP areas within the carcinomas. These carcinomas had the following common histological and immunohistochemical features: a serrated structure resembling SA; a lace-like structure; infiltrative growth within the muscularis propria, with dedifferentiation at the invasive front; and immunohistochemical expression of pS2 and human gastric mucin. Based on these features, a new subtype of carcinoma is proposed, with a cell lineage common to SA and H/MP. It would also seem that p53 is involved in the serrated adenoma-carcinoma sequence.
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