PLCG1 and neoplasm: WES of purified, neoplastic T‐cell (CD3+PD1+) demonstrated high concordance with whole tumor biopsies and validated the presence of TET2 and DNMT3A in tumor and non‐lymphoid cells, but other mutations (CD28, RHOAG17V, IDH2R172, PLCG1) in neoplastic cells.