Figure 4: Iliac bone marrow biopsy shows increased fibroblasts and reduced marrow cellularity with an increase in reticulin (100 and 200x). On November 18, 2009, an iliac bone marrow biopsy was performed in the patient, and the slide was stained with H&E. The arrows show increased fibrous tissue. The upper panel (200x) is a blowup of the panel (100x) within the square area.