 Using reverse transcription and the polymerase chain reaction (RT-PCR), we determined the level of expression of BCL-2/IgH in 18 follicular center cell lymphomas containing a t(14;18) translocation involving the major breakpoint region and five non-neoplastic lymph nodes.     ///    "BCL-2/IgH transcripts were demonstrated in 16 follicular center cell lymphoma cases (five high, 11 low) and were not present in any of the five non-neoplastic lymph nodes. "    ///    "In the two follicular lymphoma cases in which BCL-2/IgH transcripts could not be detected by RT-PCR, PCR amplification of genomic DNA indicated this was not due to primer selection. "