In this study, we investigated THOR methylation status and TPM analysis in parotid PAs and salivary carcinomas and compared normal parotid gland tissue, i.e., parotid tissue from glands without any neoplastic disease (tissue excised due to cyst, calculus, etc.), adjacent parotid tissue taken from glands containing PA and recurrent PA, as well as tissue adjacent to carcinomas. The gene discussed is THORLNC; the disease is carcinoma.