ALK and mature T-cell and NK-cell non-Hodgkin lymphoma: With the exception of ALK+ ALCL, for which National Comprehensive Cancer Network guidelines suggest first‐line treatment with CHOP (cyclophosphamide, doxorubicin, vincristine, prednisone) or CHOEP (CHOP+etoposide), there is no well‐defined algorithm for treating patients with PTCL 3.