BCR and mature T-cell and NK-cell non-Hodgkin lymphoma: Using this approach for the AITL, ALCL, and ENKTL PTCL subtypes, a greater number of total and unique BCR clonotypes were observed in AITLs than in ALCLs or ENKTLs, indicating a greater average BCR diversity for AITLs (Fig. 7A and B).