GATA2 IHC in benign adult bone marrow. (A-B) Representative fields of GATA2 IHC in adult bone marrow (DAB and hematoxylin; original magnification ×400). (C) GATA2⁺ mononuclear cells (DAB and hematoxylin; original magnification ×400). (D) Representative megakaryocytes, showing both GATA2⁺ and GATA2⁻ examples (DAB and hematoxylin; original magnification ×400). (E) Percent bone marrow blasts and percent GATA2⁺ bone marrow mononuclear cells (n = 10). (F) Percent of representative cells positive for indicated marker, which are also GATA2⁺ by dual IHC (n = 5). Error bars = standard error of the mean (SEM).