In addition, the roles or/and molecular mechanisms of FEZF1-AS1, LINC01234, LINC00460, and LINC00659 in the development of CRC have been examined in previous studies and few studies have been conducted to explore the functions and molecular basis of MIR31HG and LINC00355 in CRC progression. This evidence concerns the gene PTGDR and colorectal carcinoma.