RPA1 and carcinoma: The overall THOR methylation status for the seven different groups showed a marked difference between several groups, particularly between the non-neoplastic parotid tissue compared with carcinomas (40.00%), PAs (27.98%), rPA (37.17%), and parotid tissue adjacent to carcinomas (21.71%) (Supplementary Figure S1; Table 2, Table 3, Table 4 and Table 5).