It was established that induction of both, RET/PTC1 and RET/PTC3 rearrangements was present only in carcinoma samples.     ///    [Analysis of the expression of RET/PTC oncogenes in post-chernobyl papillary thyroid carcinomas of patients from different age groups]..     ///    The presence of RET/PTC oncogenes was detected using polymerase chain reaction.     ///    It should be noted that the part of carcinomas with induction of RET/PTC1 did not change with increasing the age of patients.     ///    In PTCs the percentage of RET/PTC-positive tumors with increasing the age of patients has been decreasing. 