RHOA and mature T-cell and NK-cell non-Hodgkin lymphoma: Furthermore, less than half of patients with PTCL-not otherwise specified (NOS) (41%) exhibit more than two TFH markers (PTCL-TFH) [4], and the PTCL-TFH patients show similar incidences of gene mutations of Ras homolog family member A (RHOA) G17V and tet methylcytosine dioxygenase (TET)2 to those of AITL and F-TCL [5].