The term<unk>  describes an increased white blood cell count (> 50,000 cells/μL), which is a physiological response to stress or infection (as opposed to a primary blood malignancy, such as leukemia). It often describes the presence of immature cells such as myeloblasts or red blood cells with nuclei in the peripheral blood. It may be lymphoid or myeloid.
Leukemoid reaction
Mast cell leukemia
Lymphoid leukemia
AIDS-related lymphoma
Prolymphocytic leukemia
Mixed-phenotype acute leukemia
Acute myeloid leukemia
Chronic neutrophilic leukemia