CTL immunostaining in nonclonal T-cell LGL disorder.

Immunoperoxidase stains for CD3 (A) and CD8 (B) demonstrating increased numbers of singly distributed cells in the marrow interstitium. Aminoethyl carbazol chromogen, hematoxylin counterstain; original magnification: × 240. (C) Immunoperoxidase stain for granzyme B demonstrating isolated positive cells. Aminoethyl carbazol chromogen, hematoxylin counterstain; original magnification: × 240.