IDO1 and neoplasm: We discovered that 26 different tumor types over-expressed IDO1. In addition to the 12 types of tumors mentioned above, there are ACC, COAD, BLCA, DLBC, LGG, LUAD, PAAD, OV, PRAD, READ, TGCT, SKCM, THYM, and UCS, the combined data showed significant differences in IDO1 expression in CESC, DLBC, KIRC, OV, STAD and UCEC.