Myeloproliferative
Referring to the proliferation of the bone marrow cells that give rise to red blood cells, granulocytes (a type of white blood cells), and/or platelets (crucial to blood clotting).
The term myeloproliferative is in contrast to lymphoproliferative which refers to proliferation of lymphoid cells and reticuloendothelial cells such as macrophages.
Both terms -- myeloproliferative and lymphoproliferative -- can be applied to conditions that are entirely benign, premalignant, or frankly malignant