Progress in the treatment of NK-cell lymphoma/leukemia
Ayumi Fujimoto , Ritsuro Suzuki
Journal of Cancer Metastasis and Treatment ›› 2021, Vol. 7 : 66
Natural killer (NK)/T cell lymphoma includes two major subtypes of disease, specifically extranodal NK/T cell lymphoma, nasal type (ENKL) and aggressive NK cell leukemia (ANKL). Both are strongly associated with Epstein-Barr virus and are prevalent in East Asia and Latin America. Except for that of limited-stage ENKL, the prognosis of both diseases was poor in the previous decade. The advent of non-anthracycline-based chemoradiotherapy has contributed to an improvement in ENKL prognosis, but there is still room for further treatment progress. Recently, the high efficacy of PD-1 antibody was reported in relapsed or refractory ENKL patients. This was later supported by the finding that PD-L1/PD-L2 genetic alterations are frequently observed in ENKL and ANKL patients. Due to the rarity of the disease, a standard treatment for ANKL remains to be established. Currently, allogeneic stem cell transplantation is the only curative treatment, and this is even applicable to chemo-resistant ANKL patients. In this review, we focus on recent treatment approaches for NK/T cell lymphomas including novel agents.
Extranodal NK/T-cell lymphoma / nasal type / aggressive NK-cell leukemia / Epstein-Barr virus / hematopoietic stem cell transplantation / L-asparaginase
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