In fact, specific polymorphisms in UGT1A1 gene and the consequent hyperbilirubinemia are correlated positively with an increased overall survival in cancer patients (Vitek et al., 2019b), particularly considering colorectal (Jirásková et al., 2012), lung and breast cancers (Wagner et al., 2015). Here, UGT1A1 is linked to breast carcinoma.