 The translocation t(14;18) resulting in fusion of the BCL2 and the immunoglobulin heavy chain genes (BCL2-IGH) is present in 80% to 90% of follicular lymphomas and 20% to 30% of diffuse large B-cell lymphomas.     ///    "With significantly improved analytic specificity, one round of PCR is sufficient to detect the BCL2-IGH gene rearrangements without further confirmation.. "    ///    Detection of BCL2-IGH using single-round PCR assays..     ///    "To simplify the BCL2-IGH assay procedure, we attempted to eliminate the nonspecific PCR products by optimizing the annealing temperatures of the PCR assays using a gradient thermocycler. "