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Published on: February 22, 2020
Spontaneous regression of natural killer cell lymphoma
1Department of Hematology, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan.
Abstract:
Spontaneous tumour regression is extremely rare in aggressive lymphoma. A case of natural killer (NK) cell lymphoma with cutaneous manifestation showed an indolent clinical course, and the relapsed nodular lesion disappeared spontaneously without any treatment. Although only small number of T cells were present in the primary skin lesion, there was massive CD8-positive cytotoxic T cell infiltration in the relapsed lesion. This is believed to be the first report of an abscopal effect on NK cell lymphoma. Infiltration of cytotoxic T cells strongly suggests immunological attack against the lymphoma cells.

