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  • Title: [Epstein-Barr virus associated natural killer cell leukemia: report of an autopsy case].
    Author: Takai K, Sanada M, Shibuya H.
    Journal: Rinsho Ketsueki; 1995 May; 36(5):500-5. PubMed ID: 7783357.
    Abstract:
    A 20-year-old female was admitted because of high fever, hepatosplenomegaly, severe hepatic dysfunction and coagulopathy. Peripheral blood showed pancytopenia and granular lymphocytes bearing the natural killer cell phenotype (CD2+CD3-CD16+CD56+CD57-TCR alpha beta-TCR gamma delta-) constituted 97% of leucocytes. Southern blot analysis of DNA obtained from peripheral blood mononuclear cells showed germ-line configuration of TCR beta, gamma and delta chain genes. EBV-DNA was detected in a single episomal form by using EBV-terminal repeat probe. Bone marrow findings were consistent with hemophagocytic syndrome and administration of VP-16 was effective transiently. After ten months she died from massive gastrointestinal bleeding. An in situ hybridization study identified EBV-RNA (EBER-1) in atypical lymphocytes infiltrating bone marrow, spleen and lymph nodes. Sections of liver showed steatosis and infiltration of T cells (CD3+ and EBER-1-negative) in the portal areas and few atypical lymphocytes in sinusoids. The patients developed an EBV-associated clonal proliferation of natural killer (NK) cells, but the clinical features were suggestive of chronic active EBV infection or virus-associated hemophagocytic syndrome (VAHS) rather than leukemia. Bone marrow transplantation for NK cell leukemia is an issue to be discussed.
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