title: [Sarcomatous hepatocellular carcinoma].
abstract: Atypical variants of liver carcinomas may represent diagnostic pitfalls when compared with classical types. We described two cases of unusual hepatocellular carcinoma with sarcomatoid pattern. Both were large tumors in elderly people. Their immunohistochemical investigation showed a coexpression of various epithelial and mesenchymal markers. There were positivities of antibodies against cytokeratin, actin and desmin in the first case, against cytokeratin, chromogranin and actin in the second case and against EMA and A1AT in both of them. Such a tumor was not found either in five year bioptic and four year necroptic archival material or in the Hlava Institute histopathological collection. The frequency of the tumor was about 4% of all hepatocellular carcinomas according to the literature.
authors.affiliation: Hlavův I. patologickoanatomický ústav 1. LF UK a VFN, Praha.
authors.forename: T
authors.initials: T
authors.lastname: Mirejovský
authors.forename: P
authors.initials: P
authors.lastname: Mirejovský
mesh_terms: D000199:Actins / Q000032:analysis; D000368:Aged; D006528:Carcinoma, Hepatocellular / Q000737:chemistry / Q000473:pathology*; D003893:Desmin / Q000032:analysis; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000032:analysis; D008113:Liver Neoplasms / Q000737:chemistry / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012509:Sarcoma / Q000473:pathology*
chemical_list: D000199:Actins; D003893:Desmin; D007633:Keratins
vernacular_title: Sarkomatoidní hepatocelulární karcinomy.