title: Paneth cell tumor. An additional case of duodenal adenoma with malignant change.
abstract: A papillary adenoma with malignant change consisting of only Paneth cells and their precursors is described. Neoplastic proliferation of Paneth cells is discussed from a point of view of cell biology.
mesh_terms: D002454:Cell Differentiation; D002455:Cell Division; D003537:Cystadenoma / Q000473:pathology*; D004379:Duodenal Neoplasms / Q000473:pathology*; D004847:Epithelial Cells; D004848:Epithelium / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged