Definition: 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.
Other names NK-T-Cell Lymphomas, Extranodal; NK-T-Cell Lymphoma, Extranodal; Lymphomas, Extranodal NK-T-Cell; Lymphoma, Extranodal NK T Cell; Extranodal NK-T-Cell Lymphomas; Extranodal NK T Cell Lymphoma, Nasal and Nasal Typ; Extranodal NK T Cell Lymphoma, Nasal Type; Extranodal NK T Cell Lymphoma, Nasal; Extranodal NK T Cell Lymphoma; Extranodal NK-T-Cell Lymphoma, Nasal and Nasal-Typ; Extranodal NK-T-Cell Lymphoma, Nasal Type; Extranodal NK-T-Cell Lymphoma, Nasal; Extranodal NK-T-Cell Lymphoma
