The normal bone marrow picture is in an active state of proliferation, with three to four times as many red blood cells as granulocytes; granulocytes account for 50% to 60% of the nucleated cells, and young erythrocytes account for about 20% of the nucleated cells; lymphocytes account for about 20% of the cells; monocytes and plasma cells account for about 4% of the cells; megakaryocytes can be seen in 1.5 cm by 3 cm sheets with 7 to 35 cells; and a very few reticulocytes can be seen as well, endothelial cells, tissue basophils and so on. The number of erythrocytes was normal.