<unk>  (also called neutrophil leukocytosis or occasionally neutrocytosis) is leukocytosis of neutrophils, that is, a high number of neutrophil granulocytes in the blood.
A "left shift" refers to the presence of increased proportions of younger, less well differentiated neutrophils and neutrophil-precursor cells in the blood.  This generally reflects early or premature release of myeloid cells from the bone marrow, the site where neutrophils are generated.  A severe<unk>  with left shift is referred to as a leukemoid reaction. The leukocyte alkaline phosphatase (LAP) score, which refers to the amount of alkaline phosphatase per neutrophil, will increase. In a severe infection, toxic granulation changes happen to the neutrophils.
This can resemble Pelger-Huet anomaly.
Neutrophilia
Acanthocytosis
Plasmacytosis
Monocytosis
Lymphocytosis
Neuroacanthocytosis
Thrombocytosis
Spherocytosis