Sixty-six papillary thyroid carcinomas (PTC) and thirty-six control cases with frozen and paraffin-embedded tissues were analyzed for the expressions of WT-RET and oncogene RET/PTC1 or RET/PTC3 by nested RT-PCR.     ///    "(3) Fourteen PTCs (21.2%) expressed RET/PTC, including five cases expressing RET/PTC1 and nine cases expressing RET/PTC3. "