Immunohistochemical staining was conducted to evaluate RET/PTC rearrangements by using two different anti-RET antibodies.     ///    A second genetic alteration frequently involved in PTC is RET/PTC rearrangements.     ///    "To test whether BRAF mutation may cooperate with RET/PTC rearrangements in the oncogenesis of PTC, we tested whether BRAF-mutated PTCs were also positive for RET/PTC rearrangements. "    ///    These observations suggest that mutated BRAF gene may cooperate with RET/PTC to induce the oncogenesis of PTC.. 