The results showed that the expression levels of CMTM6 and PD-L1 were positively correlated in TCs and ICs (r = 0.516, P < 0.001 and r = 0.714, P < 0.001, respectively) in dMMR CRC compared with pMMR CRC (r = 0.062, P = 0.488 and r = 0.223, P = 0.012, respectively, Table 1). Here, CMTM6 is linked to colorectal carcinoma.