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CD52 expression in hairy cell leukemia
Author(s) -
Quigley Michael M.,
Bethel Kelly J.,
Sharpe Robert W.,
Saven Alan
Publication year - 2003
Publication title -
american journal of hematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.456
H-Index - 105
eISSN - 1096-8652
pISSN - 0361-8609
DOI - 10.1002/ajh.10428
Subject(s) - cd52 , alemtuzumab , hairy cell leukemia , medicine , chronic lymphocytic leukemia , leukemia , monoclonal antibody , antigen , monoclonal , immunology , flow cytometry , pancytopenia , antibody , bone marrow
Hairy cell leukemia (HCL) is a rare chronic B‐cell lymphoproliferative disorder characterized by splenomegaly, pancytopenia, and circulating atypical lymphocytes with circumferential cytoplasmic projections. Although uncommon, HCL cases refractory to standard therapy occur, and effective alternatives are limited. There is evolving literature supporting monoclonal antibody therapy in the treatment of B‐cell lymphoid malignancies, including anti‐CD52 (Campath‐1H, alemtuzumab). We have examined nine cases of HCL and one case of HCL variant by flow cytometry for CD52 expression. All cases expressed CD52 antigen in 92–100% of the malignant cells. The demonstration of CD52 antigen expression on HCL cells provides the rationale for the use of alemtuzumab in refractory HCL. Am. J. Hematol. 74:227–230, 2003. © 2003 Wiley‐Liss, Inc.