RET/PTC rearrangement was determined by reverse transcription (RT)-PCR-sequencing of tumor cDNA.     ///    "Concomitant BRAF(V600E) and KRAS, or BRAF(V600E) and RET/PTC-1 mutations were found in two CPTC, and six CPTC and one tall-cell variant, respectively. "    ///    "RET/PTC-1 was detected in nine CPTC, one tall-cell variant, and two FVPTC. "    ///    "However, although concomitant mutations of RET/PTC, RAS, or BRAF have been reported recently, their significance for tumor progression and survival remains unclear. "    ///    "Concomitant RAS, RET/PTC, or BRAF mutations in advanced stage of papillary thyroid carcinoma.. "