Certified Emergency Nurse (CEN) Practice Test 2025 - Free CEN Practice Questions and Study Guide

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Which condition is characterized by a decreased white blood cell count?

Leukocytosis

Leukopenia

Leukopenia is the condition characterized by a decreased white blood cell count, which is crucial for the body’s immune response. A low white blood cell count can increase the risk of infections because it indicates a reduced ability to fight off pathogens. Various factors can lead to leukopenia, including bone marrow disorders, autoimmune diseases, certain medications, and severe infections that use up white blood cells faster than they can be produced.

In contrast, leukocytosis refers to an increase in white blood cells, typically indicating infection or inflammation. Thrombocytosis is related to an increased platelet count, which can lead to clotting issues, while hemophilia A is a genetic condition affecting blood coagulation, not directly related to white blood cell counts. Understanding these distinctions is important for accurately interpreting laboratory results and recognizing conditions that may affect a patient’s immune system.

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Thrombocytosis

Hemophilia A

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