Disorders which share common features: Polycythemia Vera causes the overproduction of red cells, white cells and platelets; Idiopathic Myelofibrosis has an overproduction of white cells or platelets with anemia and an increase in bone marrow fibrous tissue. Essential Thrombocytosis features an increase in circulating platelets. Also Chronic Neutrophilic Leukemia and Chronic Eosinophilic Leukemia both which may develop into Leukemia.

This category contains sites with information regarding leukemia and lymphoma and other blood-related cancers, their treatments, as well as charities dedicated to this and personal sites of cancer victims.

Cancer of the lympth tissue.

Multiple Myeloma is a cancer of the plasma cell. It is considered an incurable but treatable disease.

Waldenstrom's Macroglobulinemia is a rare type of slow-growing, non-Hodgkin’s lymphoma.