After searching for target circular RNAs in related databases, we listed the circular RNAs related to the pathological mechanism of hepatocellular carcinoma, including hsa_circ_0001649, hsa_circ_0005075, CircZKSCAN1, hsa_circ_0001445, hsa_circ_0003998, Circ-104075, Circ-TCF4.85, Circ-CDYL, hsa_circ_0027345, hsa_circ_0051443, hsa_circ_0005397. The gene discussed is CDYL; the disease is hepatocellular carcinoma.