<unk>  is an extremely aggressive subtype of acute myeloid leukemia that usually occurs de novo but can, rarely, evolve from transformation of chronic myeloid leukemia into the more aggressive acute myeloid leukemia. In a small proportion of cases, acute<unk>  may evolve from a more progressive form of systemic<unk> ocytosis. The diagnosis of acute<unk>  by the WHO criteria includes the requirement for a prevalence of 20% neoplastic<unk> <unk> s in marrow and 10% in blood. If the<unk> <unk> s represent less than 10% of blood<unk> s, the tumor is called "aleukemic"<unk> .
Mast cell leukemia
Leukemoid reaction
Hemophagocytic lymphohistiocytosis
Chronic eosinophilic leukemia
Acute eosinophilic leukemia
Large granular lymphocytic leukemia
Diffuse infiltrative lymphocytosis syndrome
Thymoma with immunodeficiency