We found positive correlations between MR1 expression and MAIT scores in CRC (p = 0.0081, Pearson correlation), stomach adenocarcinoma (p = 0.0015), prostate adenocarcinoma (p = 1.29e−10), lung adenocarcinoma (p = 0.00088), and clear cell renal cell carcinoma (p = 0.013). Here, MR1 is linked to prostate adenocarcinoma.