CD4 and neoplasm: The clinical effect, liver function index, humoral immunity index (IgG, IgM, and IgA), cellular immunity index (CD3, CD4, CD4/CD8, and CD8), tumor marker alpha-fetoprotein (AFP), carcinoembryonic antigen (CEA), carbohydrate antigen 199 (CA199), and life quality were compared before and after treatment.