AFP and hepatocellular carcinoma: Also, the levels of plasma HSP90α in HCC patients with a greater than or equal to an AFP concentration of 400 ng/mL were higher than patients with an AFP of less than 400 ng/mL (182.10 ± 8.41 vs. 110.93 ± 5.14 ng/mL, respectively, p < 0.001).