An extranodal neoplasm, usually possessing an NK-cell phenotype and associated with EPSTEIN-BARR VIRUS. These lymphomas exhibit a broad morphologic spectrum, frequent necrosis, angioinvasion, and most commonly present in the midfacial region, but also in other extranodal sites.

Synonyms: Extranodal NK T Cell Lymphoma Extranodal NK T Cell Lymphoma, Nasal and Nasal Type Extranodal NK-T-Cell Lymphoma, Nasal NK-T-Cell Lymphoma, Extranodal Extranodal NK-T-Cell Lymphoma Extranodal NK-T-Cell Lymphoma, Nasal Type NK-T-Cell Lymphomas, Extranodal Extranodal NK-T-Cell Lymphoma, Nasal and Nasal-Type Extranodal NK-T-Cell Lymphomas Lymphoma, Extranodal NK-T-Cell Extranodal NK T Cell Lymphoma, Nasal Type Lymphoma, Extranodal NK T Cell Extranodal NK T Cell Lymphoma, Nasal Lymphomas, Extranodal NK-T-Cell