DQA1 * 0301 allele may be able to protect against the risk of liver cancer, which carriy of DQA1 * 0501 allele may be a signal of the risk of liver cancer, who carry alleles DQA1 * 0101 and DQA1 * 0102 allele can protection to avoid the risk of lung cancer, who had a DQA1 * 0501 allele may signal risk of lung cancer.