reported that PTCL‐NOS with TP53/CDKN2A mutation has remarkable chromosomal instability and poor prognosis, although the association of TP53/CDKN2A mutation with PTCL‐GATA3 was not described in the Watatani study. This evidence concerns the gene TP53 and mature T-cell and NK-cell non-Hodgkin lymphoma.