At the same time the frequency of RET/PTC3 rearrangements with the increasing both the latency period and age of patients, significantly decreased.     ///    "It was established that induction of both, RET/PTC1 and RET/PTC3 rearrangements was present only in carcinoma samples. "    ///    " A comparative analysis of the expression of both, RET/PTC1 and RET/PTC3 oncogenes in papillary thyroid carcinomas (PTC) of patients from different age groups was carried out. "    ///    "In conclusion, our data can evidence for the presence of correlation between the age of patients, latency period and induction of RET/PTC3 oncogenes.. "