The circ-PTPDC1 level was found to be elevated in the tumor tissues of 103 of these patients (p<0.001) (Fig. 4E-F). The average expression of circ-PTPDC1 in gastric cancer and adjacent tissues is shown in Fig. 4G. In addition, as shown in Fig. 4H, the circ-PTPDC1 expression level was significantly higher in more advanced tumors according to the patients' documents. The gene discussed is PTPDC1; the disease is neoplasm.