The AUC values of CASC15, CASC16, CASC8, CASC9, CASC19, and CASC18 for the diagnosis of CRC were 0.78, 0.83, 0.91, 0.75, 0.98, and 0.87, respectively (Figure 2). The gene discussed is CASC18; the disease is colorectal carcinoma.