The most common subtype was extranodal NK/T-cell lymphoma, nasal type (ENKTCL), followed by peripheral T-cell lymphoma, not otherwise specified (PTCL, NOS), anaplastic large cell lymphoma (ALCL), angioimmunoblastic T-cell lymphoma (AITL), subcutaneous panniculitis-like T-cell lymphoma (SPTCL) and primary cutaneous CD30 positive lymphoproliferative disorders (PCCD30LD). The gene discussed is TNFRSF8; the disease is mature T-cell and NK-cell non-Hodgkin lymphoma.