We compared the SMGs to known cancer genes annotated in the COSMIC as well as other published studies, most of the SMGs we identified (TP53, NOTCH1, FAT1, ZNF750, RB1, PTCH1, PIK3CA, FBXW7, NFE2L2 and CDKN2A) are consistent to the ones reported previously in ESCC [20, 23–25]. The gene discussed is PTCH1; the disease is esophageal squamous cell carcinoma.