PIK3CD and peripheral T-cell lymphoma, not otherwise specified: To verify the accuracy of the DEGs, 9 downregulated DEGs (AKT1, NFKB1A, TRADD, MAP2K1, MAP2K6, MAP3K7, PIK3CD, TRAF1, TNFRSF1B) and 10 up regulated DEGs (CAMTA1, HIST1H3B, ARHGEF12, PBX1, HIST1H4I, TAL1, YWHAE, ACVR1, MAX, GNAS) were confirmed in a quantitative real time PCR comparison of chemotherapy resistance in extranodal peripheral T cell lymphoma from 6 clinical specimens.