Development of small hepatocellular carcinoma 80 months after clearance of hepatitis C virus with interferon therapy.

We describe a patient who had a complete and sustained response to interferon (IFN) therapy for chronic hepatitis C but developed small hepatocellular carcinoma (HCC) 80 months later. A 55-year-old Japanese man with hepatitis C virus (HCV) infection and histological features of chronic active hepatitis was treated with recombinant IFN alpha-2a, 9,000,000 U daily for 2 weeks followed by three times a week for 22 weeks. He successfully responded to IFN therapy with a normalization of serum alanine aminotransferase and continuous disappearance of serum HCV-RNA. However, 80 months after the cessation of IFN therapy, the patient's alpha-fetoprotein (AFP) level became elevated for the first time and HCC, 12 mm in diameter, was detected by routine ultrasonographic screening. Laparotomy revealed a small HCC with no metastasis, and the nontumorous liver demonstrated chronic inactive hepatitis. This case indicates the need for careful follow-up using ultrasonography and AFP testing for at least 7 years after completing IFN therapy in all patients with chronic hepatitis C, even if the patients have a complete response to the therapy.