Reduced frequency of CD56⁺CD3⁻ NK cells and enrichment of the CD56^dim NK cell subset in GATA2 patients. Analysis of PBMCs from whole blood by FACS. Cells were (A) gated on lymphocytes, (B) further gated on CD56⁺CD3⁻, and (C) then analyzed for CD56 density with the aid of CD16 to identify CD56^dim populations. (Bottom) One representative healthy donor control is shown.