Patterns of staining for granzyme B in T-cell GLL.

(A) Immunoperoxidase stain for granzyme B demonstrating an interstitial cluster of more than 6 granzyme B⁺ T cells. Aminoethyl carbazol chromogen, hematoxylin counterstain; original magnification: × 240. (B) Immunoperoxidase stain for granzyme B demonstrating the intravascular location of the granzyme B⁺ lymphocytes. Aminoethyl carbazol chromogen, hematoxylin counterstain; original magnification: × 240.