Because RET/PTC gene rearrangements are specific to papillary thyroid carcinoma, the authors examined the presence of RET/PTC-1, -2, and -3 in eight hyalinizing trabecular tumors using reverse transcription-polymerase chain reaction with Southern hybridization and immunohistochemistry.     ///    They detected the presence of a RET/PTC gene rearrangement in six of the eight hyalinizing trabecular tumors. 