Detection of trisomy 12 by FISH in untreated B-chronic lymphocytic leukemia: correlation with stage and CD20 antigen expression intensity.

Abstract

We studied cells from 30 controls and 85 cases of untreated B-chronic lymphocytic leukemia (CLL) with a fluorescence in-situ hybridization (FISH) technique utilizing a probe to chromosome 12. By use of a threshold of > 2% for trisomy 12 for the CLL cases (the mean +3 SD for controls was 1.3%), 20% (17/85) were trisomy 12. The mean % cells positive was 32.6… (More)

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