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Hematology 2006
© 2006 The American Society of Hematology

New Prognostic Markers in CLL

Emili Montserrat

Correspondence: E. Montserrat, M.D., Department of Hematology, Hospital Clínic, Villarroel, 170, 08036 Barcelona, Spain; Phone + 34 92 227 54 75; Fax + 34 92 337 58 11; Email emontse{at}clinic.ub.es

Abstract

The individual prognosis of patients with chronic lymphocytic leukemia (CLL) is extremely variable. Although clinical stages remain the basis for assessing prognosis in CLL, a number of biological markers, particularly serum markers, cytogenetic abnormalities, IgVH mutations, CD38 and ZAP-70 expression in leukemic cells offer important, independent prognostic information. Before being incorporated into daily practice, however, these markers require standardization and validation in large, prospective trials. Meanwhile, treatment of patients with CLL not included in clinical studies should be decided on the basis of classical NCI/CLL Working Group criteria. An important area of research in CLL prognostication is the identification of markers useful for predicting response to therapy and its duration. Among them, del(17p), reflecting P53 abnormalities, is particularly important. Also relevant is del(11q), which points to ATM defects. There is also some correlation between IgVH mutational status, ZAP-70 and CD38 expression and response to therapy and its duration, although these relationships need further investigation. Finally, there is increasing evidence that response to therapy, particularly in those cases in which minimal residual disease is eradicated, is associated with longer survival.


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Copyright © 2006 by the American Society of Hematology.