Patterns of cytokine and chemokine mRNAs in lymphoproliferative disease tissues shown by RT-PCR analysis. Total cellular RNA, extracted from paraffin-embedded tissues representative of lymphomatoid granulomatosis, nasal T/NK-cell lymphoma, lymphoid hyperplasia, malignant B-cell lymphoma, and Burkitt's lymphoma, was subjected to RT-PCR analysis using appropriately designed primers.