We describe the features of 24 cases of hepatocellular carcinoma (HCC) with prominent intrabile duct tumor growth seen among 238 autopsy and 21 surgical cases of HCC. Progressive obstructive jaundice occurred during the course of most cases and was the presenting sign in nine. A fluctuating rise and fall of the total bilirubin was seen in two cases. The average survival time of the cases was significantly shorter than that of HCC patients without intrabile duct tumor growth (Mann-Whitney's U-test, one-tailed, P less than 0.05). The average survival time after the development of severe jaundice (total bilirubin over 10 mg/dl) was only 16 days. Intrabile duct tumor casts were located in the hepatic and/or the common bile ducts in 19 cases (79%) and in five cases were seen in the peripheral (medium to small-sized) bile ducts. Hemobilia developed in five cases (21%) and was regarded as the immediate cause of death in one. Grossly all the cases presented infiltrative or mixed (infiltrative and nodular) growth pattern. Intrabile duct tumor growth and associated marked obstructive jaundice may frequently herald the terminal phase of HCC in certain patients. In our series, approximately 40% of patients with HCC and significant jaundice had gross evidence of extensive intraductal tumor growth. In the absence of intraductal tumor growth, jaundice in HCC usually was seen in a setting of progressive terminal hepatic failure.

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