Simultaneous finding of chronic lymphocytic leukemia and residual hairy cell leukemia using a lymphocyte‐binding anti‐CD antibody microarray

: The morphologic diagnosis of hairy cell leukemia coexisting with another lymphoproliferative disorder is hindered by the small size of hairy cell population. It can be simplified by presorting peripheral blood mononuclear cell using an anti-CD antibody microarray on transparent support (including anti-CD11c, CD25, CD103, and CD123) before their morphology analysis.