<unk> s are diseases of the blood and bone marrow.<unk> s are a group of diseases in which the bone marrow makes too many white blood cells. There are different types of<unk> s. In<unk>  diseases, a greater than normal number of blood stem cells become one or more types of blood cells and the total number of blood cells slowly increases.
Myeloproliferative neoplasm
Immunoproliferative disorders
Lymphoproliferative disorders
Plasma cell disorder
Leukemoid reaction
Myelofibrosis
Congenital disorders of the bone marrow
Myelodysplastic syndrome