Which term is generally defined as an increase in the absolute number of neutrophils?

Neutrophilia is defined specifically as an increase in the absolute number of neutrophils, which are a type of white blood cell essential for fighting off infections, especially bacterial infections. This condition can occur in response to various factors such as acute infections, inflammation, stress, or certain medications. The distinction of neutrophilia is important in clinical practice because it helps clinicians understand the underlying cause of a patient’s symptoms and the body's response to various stressors.

Leukopenia refers to a decrease in the number of white blood cells, and thrombocytopenia indicates a low platelet count, both of which are different from an increase in neutrophils. Leukocytosis is a broader term that refers to an increase in the overall number of white blood cells; however, it does not specifically denote an increase in neutrophils alone and can include increases in other white blood cells such as lymphocytes or eosinophils. Thus, while leukocytosis might encompass neutrophilia, neutrophilia specifically targets the neutrophil component.