Primary nodal PTCL is the most frequent subtype and includes PTCL not otherwise specified (PTCL-NOS), angioimmunoblastic T-cell lymphoma (AITL), and anaplastic lymphoma kinase positive (ALK+) and negative (ALK−) anaplastic large-cell lymphoma (ALCL) [1,2,3]. This evidence concerns the gene ALK and anaplastic large cell lymphoma.