In a study of 84 Japanese cancer patients, comprising 50 with colon cancer, 18 with stomach cancer, seven with ovarian cancer, seven with lung cancer, and two with other types of cancer, a genetic association between UGT1A7 and UGT1A9 polymorphisms and the UGT1A1-6 allele was reported. This evidence concerns the gene UGT1A7 and cancer.