WHO 2008 classification of mature T/NK-cell neoplasms.2
| * designates provisional entities |
| Leukemic or disseminated |
| T-cell prolymphocytic leukemia |
| T-cell large granular lymphocytic leukemia |
| Chronic lymphoproliferative disorders of NK cells* |
| Aggressive NK-cell leukemia |
| Adult T-cell lymphoma/leukemia (HTLV1-positive) |
| Systemic Epstein-Barr virus (EBV)–positive T-cell lymphoproliferative disorders of childhood |
| Extranodal |
| Extranodal NK/T-cell lymphoma, nasal type |
| Enteropathy-associated T-cell lymphoma |
| Hepatosplenic T-cell lymphoma |
| Extranodal—cutaneous |
| Mycosis fungoides |
| Sézary syndrome |
| Primary cutaneous CD30+ lymphoproliferative disorders |
| Primary cutaneous anaplastic large cell lymphoma |
| Lymphomatoid papulosis |
| Subcutaneous panniculitis-like T-cell lymphoma |
| Primary cutaneous γδ T-cell lymphoma* |
| Primary cutaneous aggressive epidermotropic CD8+ cytotoxic T-cell lymphoma* |
| Primary cutaneous small/medium CD4+ T-cell lymphoma* |
| Nodal |
| Angioimmunoblastic T-cell lymphoma |
| Anaplastic large cell lymphoma, ALK-positive |
| Anaplastic large cell lymphoma, ALK-negative* |
| Peripheral T-cell lymphoma, not otherwise specified |
| * designates provisional entities |
| Leukemic or disseminated |
| T-cell prolymphocytic leukemia |
| T-cell large granular lymphocytic leukemia |
| Chronic lymphoproliferative disorders of NK cells* |
| Aggressive NK-cell leukemia |
| Adult T-cell lymphoma/leukemia (HTLV1-positive) |
| Systemic Epstein-Barr virus (EBV)–positive T-cell lymphoproliferative disorders of childhood |
| Extranodal |
| Extranodal NK/T-cell lymphoma, nasal type |
| Enteropathy-associated T-cell lymphoma |
| Hepatosplenic T-cell lymphoma |
| Extranodal—cutaneous |
| Mycosis fungoides |
| Sézary syndrome |
| Primary cutaneous CD30+ lymphoproliferative disorders |
| Primary cutaneous anaplastic large cell lymphoma |
| Lymphomatoid papulosis |
| Subcutaneous panniculitis-like T-cell lymphoma |
| Primary cutaneous γδ T-cell lymphoma* |
| Primary cutaneous aggressive epidermotropic CD8+ cytotoxic T-cell lymphoma* |
| Primary cutaneous small/medium CD4+ T-cell lymphoma* |
| Nodal |
| Angioimmunoblastic T-cell lymphoma |
| Anaplastic large cell lymphoma, ALK-positive |
| Anaplastic large cell lymphoma, ALK-negative* |
| Peripheral T-cell lymphoma, not otherwise specified |