label: Hairy Cell Leukemia Variant
label_lc: hairy cell leukemia variant
description: "An indolent chronic B-cell leukemia resembling classic hairy cell leukemia but shows variant cytologic, hematologic, and immunophenotypic features and is resistant to the conventional therapy applied to hairy cell leukemia.  Biologically, it is not related to hairy cell leukemia."