Cytopathologic Attributes of Proliferating Tricholemmal Cystic Carcinoma


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View Figure  		Fig. 8A–C  Proliferating tricholemmal cystic carcinoma. The cells that make up this distinctive type of carcinoma, especially the ones situated at the periphery of aggregations, have nuclei that are crowded, large, and pleomorphic; many are in mitosis. The cytoplasm is abundant and brightly eosinophilic (in sections stained by hematoxylin and eosin) as a consequence of abnormal cornification reminiscent of that at the isthmus of a normal follicle.