title: Basal cell carcinoma--signet ring type. Ultrastructural study.
abstract: Light microscopic examination of a basalioma (basal cell carcinoma) revealed unusual keratinizing cells resembling signet ring cells with pink cytoplasmic inclusions. Ultrastructurally the inclusions consisted of filamentous masses encircled by abundant tonofilaments giving a striking picture of abnormal individual tumor cell keratinization.
mesh_terms: D000368:Aged; D002280:Basal Cell Carcinoma / Q000378:metabolism / Q000473:pathology / Q000648:ultrastructure*; D003593:Cytoplasm / Q000648:ultrastructure; D006801:Humans; D007633:Keratins / Q000378:metabolism; D008297:Male; D012878:Skin Neoplasms / Q000378:metabolism / Q000648:ultrastructure*
chemical_list: D007633:Keratins