Acute<unk>  is extremely aggressive and has a grave prognosis. In most cases, multi-organ failure including bone marrow failure develops over weeks to months. Median survival after diagnosis is only about 6 months.
Mast cell leukemia
Leukemoid reaction
Hemophagocytic lymphohistiocytosis
Chronic eosinophilic leukemia
Acute eosinophilic leukemia
Large granular lymphocytic leukemia
Diffuse infiltrative lymphocytosis syndrome
Thymoma with immunodeficiency