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Leuk Lymphoma. 2003 Jul;44(7):1223-7.

A case of clinical indolent natural killer cell lineage large granular lymphocytic leukemia in a patient with rheumatoid arthritis.

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1
Department of Haematology, Peter MacCallum Cancer Institute, St. Andrew's Place, East Melbourne, VIC 3002, Australia.

Abstract

We report a case of natural killer (NK) cell leukemia with unusual biological features in a 65-year-old woman with a 20-year history of rheumatoid arthritis. She presented with neutropenia, thrombocytopenia, splenomegaly and bone marrow infiltration. Immunophenotyping (CD2+ CD3- CD4- CD5- CD8- CD16+ CD56-) confirmed NK cell leukemia. Her neutropenia and thrombocytopenia resolved following splenectomy and she has remained well with stable disease for 12 months on oral low-dose methotrexate. In contrast to all previous reports, in this instance the phenotype of large granular lymphocytic (LGL) leukemia occurring in the context of rheumatoid arthritis was NK-cell rather than T-cell. Furthermore, the clinical course was indolent, whereas, all prior literature reports have described a very aggressive clinical course for this disorder with a median survival of just 3.5 months. This case illustrates previously unrecognized heterogeneity in the natural history of this disorder.

PMID:
12916876
DOI:
10.1080/1042819031000079203
[Indexed for MEDLINE]
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