Immunohistochemical study were done to monocyte-macrophage cells of bone marrow biopsies paraffin embedded formalin fixed using CD68 (PG-M1) from DAKO code N 1576). It include 32 cases classified into reactive group (10) cases, aplastic (12) cases, hematological malignancy group (10) cases. The last group have the highest score with mean (+3.6/hpf) and the reactive group give the least score with mean (+2.5/hpf) and the aplastic group with mean (+2.9/hpf).