Primary diseases included NK/TCL (n = 20), PTCL (not otherwise specified, PTCL-NOS) (n = 10), ALK negative anaplastic cell lymphoma (ALK-ALCL) (n = 10), angioimmunoblastic T-cell lymphoma (AITL) (n = 9) and cutaneous T-cell lymphoma (CTCL) (n = 3). This evidence concerns the gene ALK and primary cutaneous T-cell non-Hodgkin lymphoma.