By PCR, macroarray, protein, and mRNA expression techniques, additional genes in parathyroid adenoma tissues were inserted in an involved gene list: APOLLON, BCL2, CK19, CK18, CHROMOGRANIN-A, BAX, PARATHORMONE, ATM,MDM2, CK8, CYCLIN D1, SYNAPTOPHYSIN, FLIP και TRAIL (31). This evidence concerns the gene PTH and parathyroid gland adenoma.