Abstract
Combined hepatocellular and cholangiocarcinoma (cHC-CC) is a rare type of liver cancer displaying both hepatocellular and cholangiocellular components. The cholangiocellular carcinoma (CC) in these tumors ranges from focal to prominent. Those cHC-CCs with sarcomatous features are reported to have a poor prognosis. To clarify whether the CC and sarcomatous component affects the prognosis, we classified 40 patients with cHC-CCs into 4 groups according to the presence of a sarcomatous component and the extent of the CC component. Seven (17.5%) tumors showed areas with a sarcomatous component. The remaining tumors were divided into a low-CC group (CC occupying <30% of the tumor, n = 12), a middle-CC group (30%-60%, n = 15), and a high-CC group (>60%, n = 6). Vascular invasion was more frequently present in the high-CC and sarcomatous group than in the other groups (P = .0007). No lymph node metastasis occurred in either the low- or the middle-CC groups, but it was detected in 3 (50%) cases of the high-CC group and in 2 (29%) cases of the sarcomatous group (P < .0001). There was a tendency for tumor size to increase from the low- to the middle- to the high-CC group. The Ki-67 labeling index values for the hepatocellular carcinoma, C...Continue Reading
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