Hepatitis C virus (HCV) replication is reported in both tumour and non
-tumour tissue in a case of hepatocellular carcinoma. Viral replicatio
n was established by showing the presence of minus strand HCV RNA by P
CR amplification, after excluding residual reverse transcriptase activ
ity of Tag polymerase. No minus strand was found in serum derived viri
on RNA. PCR amplified products from both tumour and non-tumour parench
yma were sequenced in the 5' non-coding region and shown to be identic
al. The genotype of this Indonesian patient was found to be 1b (or II)
, the most prevalent type in the Far East.