AFP and hepatocellular carcinoma: The serum AFP level was normal in 3 patients with HCC (3.8 ng/ml, 7.9 ng/ml, and 10.3 ng/ml, respectively, normal range < 20 ng/ml), whereas the mean level was 3321 ng/mL (range, 30.1-20643 ng/ml) in the other ten patients.