Methylation of the ATM, HIC1, CDKN1B, PTEN and FHIT genes was not detected in any tumor sample, whereas low frequencies were observed for the DAPK1 (3 samples), CHFR, IGSF4, GSTP1 (2 samples), CDKN2A, RARβ, CASP8, VHL and TP73 (1 sample) genes. Here, PTEN is linked to neoplasm.