Myeloproliferative disorders are a collection of diseases that are all characterised by ‘proliferation’ or over production of one or more types of blood cells, within the bone marrow. The main groups of myeloproliferative disorders include:
Polycythemia Vera; or Polycythemia Rubra Vera - an overproduction of red blood cells
Essential Thrombocythaemia - an overproduction of platelets
Myelofibrosis; an overproduction fibrous cells resembling scar tissue, in the bone marrow. This scar tissue prevents the bone marrow from making normal amounts of other blood cells.