Other circRNAs play inhibitory roles in CRC: hsa_circRNA_103809 is expressed at low levels in CRC, and as a tumor suppressor gene, it regulates tumor cell proliferation and migration through the miR-532-3p/FOXO4 axis;19 circRNA_0026344 also acts as a tumor suppressor gene to affect the occurrence and development of tumors. Here, FOXO4 is linked to neoplasm.