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Int J Hematol. 2002 Feb;75(2):187-90.

Acute myelogenous leukemia concurrent with untreated chronic lymphocytic leukemia.

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  • 1Department of Internal Medicine, Chihaya Hospital, Fukuoka City, Japan.


We report a case of acute myelogenous leukemia (AML) concurrent with untreated chronic lymphocytic leukemia (CLL). An 84-year-old Japanese man was admitted to the Chihaya Hospital with persistent high-grade fever. Morphologic observation of peripheral blood and bone marrow smears revealed a proliferation of blasts and lymphocytosis with small and mature phenotypes. Immunophenotyping of the blast cells revealed CD13+, CD33+, CD34+, and HLA-DR+, and that of the lymphocytes revealed CD5+, CD19+, CD20+, and lambda+ on the cell surface. The peripheral lymphocytes revealed an IgH gene rearrangement. Chromosome analysis of 20 metaphase cells from bone marrow showed numerous abnormalities, containing +8,+11,+21. The patient's disease was diagnosed as AML with trilineage dysplasia concurrent with CLL. The simultaneous occurrence of AML and CLL is extremely rare but should not be overlooked as a possible underlying cause of lymphocyte abnormalities in AML patients.

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