Molecular-biological studies of PTC revealed more common RET/PTC1 and RET/PTC3 rearrangements (34.3% of cases), than BRAFV600E mutation (24%cases).     ///    RET/PTC rearrangements and BRAF(V600E) mutation were analyzed in 35 cases of PTC.     ///    PTC with any RET/PTC rearrangements had more aggressive behavior than BRAF(V600E)-positive tumors or PTC without gene alterations.. 