CMAHP and hepatocellular carcinoma: The analysis of oncological characteristics showed a significant difference between the anti‐NeuGc Ab‐positive and ‐negative groups of the HCC patients who underwent hepatectomy with early recurrence within 2 years, and no significant correlation was found between HBV or HCV infection and the results of NeuGc antigen expression, NeuGc antibody titers, and CMAHP mRNA level.