Adjective
myeloproliferative (not comparable)
(medicine) of or pertaining to the presence of an abnormal proliferation of myelopoietic cells (from bone marrow)
Myeloproliferative neoplasms are a type of blood cancer that begins with a pathological mutation (change) in a stem cell in the bone marrow which causes too many red blood cells, white blood cells, or platelets to be produced. Source: Internet