After correction of tumor purity, expression levels of ACE2 were significantly correlated with 21, 22, 34, 25, 23, and 30 immune cell markers in KIRP, KIRC, LIHC, LUSC, OV, and TGCT, respectively (Tables 2, 3 and Supplementary Table 1). This evidence concerns the gene ACE2 and neoplasm.