<unk>  are disorders of the immune system that are characterized by the abnormal proliferation of the primary cells of the immune system, which includes B cells, T cells and Natural Killer (NK) cells, or by the excessive production of immunoglobulins (also known as antibodies).  These disorders are subdivided into three main classes, which are lymphoproliferative disorders, hypergammaglobulinemia, and paraproteinemia .
Immunoproliferative disorders
Lymphoproliferative disorders
Myeloproliferative neoplasm
Congenital disorders of the bone marrow
Acquired disorders of the bone marrow
Autoimmune lymphoproliferative syndrome
Systemic autoimmune diseases
Auto-inflammatory disorders