Characterized by proliferation of immature lymphoblast( >20% in periphery)
Less than 20% of acute leukemias in adults,
Most common form in children (see also Leukemia (Peds))
Highest incidence in 7th decade of life
Acute lymphocytic leukemia
Acute myeloid leukemia
Leukemoid Reaction
Hodgkin's lymphoma
Chronic lymphocytic leukemia
Non-Hodgkin's lymphoma
Chronic myeloid leukemia
Myelodysplastic syndrome