 The prevalence of RET/PTC rearrangement in papillary thyroid carcinomas has been found to vary widely in different populations.     ///    "However, we could not find RET/PTC-3 rearrangement in any patients (0/31). "    ///    Detection of RET/PTC oncogene rearrangements in Korean papillary thyroid carcinomas..     ///    "In conclusion, we report RET/PTC rearrangements in 4 of 31, (12.9%) Korean patients with papillary thyroid carcinomas, a higher prevalence than previously reported in this population.. "    ///    "We have performed this study in order to examine the prevalence of RET/PTC-1, RET/PTC-2, and RET/PTC-3 rearrangements in Korean papillary thyroid carcinomas, and to ascertain its clinical relevance. "    ///    "In addition, there are some disagreements about the correlation of RET/PTC expression with clinical aggressiveness. "    ///    "We identified two tumors containing RET/PTC-1 (2/31, 6.5%) and two containing RET/PTC-2 (2/31, 6.5%). "