A GEP analysis of T-cell non-Hodgkin's lymphoma samples, including angioimmunoblastic lymphomas (AILT), ALK positive ALCL, ALK negative ALCL, PTCL-NOS and normal T-cells, identified a genomic classifier for the recognition of ALCL patients [16]. The gene discussed is ALK; the disease is mature T-cell and NK-cell non-Hodgkin lymphoma.