ReviewMedical molecular morphology2025
Hepatic adenosquamous carcinoma with sarcomatous transformation: a case report and review of the literature.
Review in Medical molecular morphology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Adenosquamous carcinoma (ASC) with the presence of a sarcomatous component is exceptionally uncommon in intrahepatic cholangiocarcinoma (iCCA). We report a case of hepatic ASC with rhabdoid transformation, one variation of sarcomatous change. A 72-year-old man was admitted to our hospital after being diagnosed with a 45 mm-diameter neoplastic lesion in the right hepatic duct on abdominal computed tomography. Laboratory findings showed increases in AST, ALT, ALP, gamma-GT, CA19-9 and DUPAN-II. The patient then underwent an extended right hepatectomy. Histopathologically, the tumor was composed of an ASC component within an abundant fibrous stroma and a sarcomatoid carcinoma component. By immunohistochemistry, keratin 7 and keratin 19 were expressed by all tumor cells. Expression of keratin 5/6, p40 and p63 was restricted to the squamous component. The sarcomatoid component was immunoreactive for vimentin with no loss of INI1 expression. This component also showed a loss of membranous E-cadherin expression and a reduction of membranous β-catenin expression. Staining for desmin, myoglobin and HepPar1 was negative in any tumor cells. The patient died of liver failure 3 months after surgery. This report aims to provide a better understanding of the clinicopathological characteristics and disease progression of the rare variants of iCCA to aid diagnosis and treatment.
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