immunostain is mostly negative. CD34 was negative (not shown). (i)-(l): The third bone marrow biopsy shows patchy low cellularity (i, H&E 200×) and mild to moderate fibrosis (j, Reticulin stain ...

No significant cytologic atypia or mitotic figures were identified. A CD34 immunostain was positive in scattered dendritic cells (Figure 3). Procollagen staining was not performed. These biopsy ...