BRAF V600E is also seen in unclassifiable splenic B-cell lymphoma/leukemia, a potential mimic of hairy cell leukemia

To the editor: The virtually 100% diagnostic sensitivity and specificity of the BRAF V600E mutation for hairy cell leukemia (HCL), within the context of mature B-cell neoplasms, originally described by Tiacci et al,[1][1] was recently confirmed in Blood .[2][2],[3][3] We report this mutation in a