TRBV9 and neoplasm: The predominance of TRBV6 and TRBV20 was also evident in MAIT cells from the normal and tumor tissues of the indicated cancers (Figure 2B) with the exception of the healthy colonic tissues of CRC patients, in which the usage of TRBV11-2, TRBV27, TRBV4-2, and TRBV9 was comparable to or more apparent than that of TRBV6 and TRBV20, respectively (Figure 2B).