ALK and mature T-cell and NK-cell non-Hodgkin lymphoma: All patients had histopathologically confirmed PTCLs, comprising angioimmunoblastic T-cell lymphoma (AITL; n = 33, 62%), peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS; n = 10, 19%), anaplastic lymphoma kinase (ALK) positive anaplastic large cell lymphoma (ALK + ALCL; n = 4, 8%) and ALK negative ALCL (ALK − ALCL, n = 6, 11%).