Figure 2From: Rare aggressive natural killer cell leukemia presented with bone marrow fibrosis - a diagnostic challengeBone marrow biopsy findings. (A) Biopsy section (H&E), at low magnification (20×) showing infiltration by abnormal lymphoid cells. (B) CD56 immunostain highlighting marked increase in NK cells (50×). (C) Reticulin stain highlighted an increase in reticulin fibrosis (50×), (D) Trichrome stain highlighting focal bundles of collagen deposition (50×).Back to article page