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A 68-year-old Japanese woman was admitted to our hospital in September 1995, because of a mass detected by ultrasonography during a follow-up examination for chronic hepatitis B. Hepatocellular carcinoma (HCC) in the right liver lobe was diagnosed based on imaging studies and elevated alpha-fetoprotein (AFP). Percutaneous ethanol injection therapy (PEIT) was performed. PEIT was repeated in November 1998, because the tumor had enlarged and serum AFP was re-elevated. Follow-up ultrasonography (US) demonstrated low echoic mass in the left liver lobe in August 1999; serum AFP was normal, but serum carbohydrate antigen 19-9 (CA19-9) was elevated to 420 U/ml. In October 1999, radiofrequency interstitial tissue ablation (RITA) was performed after tumor biopsy. Pathological findings revealed adenocarcinoma and pathological diagnosis was made as intrahepatic cholangiocellular carcinoma (ICC). Three weeks later, her serum CA19-9 was remarkably decreased (180 U/ml). The patient has been well for 5 months. Her latest AFP and CA19-9 in the serum were 2 ng/ml and 89 U/ml, respectively. The incidence of double cancer in the liver is rare. This is also the first case report to discuss ICC treated with RITA.

Heterochronous Development of Intrahepatic Cholangiocellular Carcinoma Following Hepatocellular Carcinoma in a Hepatitis B Virus Carrier.