ABCG2 and cancer: In addition, there are significant correlations between the expression of ABCG2 with MSI in 10 cancer types, including esophageal carcinoma (ESCA), UCEC, THCA, STAD, SARC, LUSC, LUAD, KIRP, DLBC, and BRCA, of which ESCA patients are positively correlated to the expression of ABCG2, and the other cancer types show the opposite trend.