What is leukopenia?

What is leukopenia?

• A. WBC count >11 x10^9/L.
• B. WBC count 4.0-11.0 x10^9/L.
• C. Platelet count <100 x10^9/L.
• D. WBC count <2.0 x10^9/L.

Answer: (D)

Leukopenia means a lower-than-normal white blood cell count. The normal range for white blood cells is about 4.0 to 11.0 x10^9/L. When the count drops below this range, it’s considered leukopenia, and its more severe form—below around 2.0 x10^9/L—significantly raises the risk of infections because there are fewer cells available to fight pathogens. The other options describe a high WBC count (leukocytosis), a normal WBC range, or an issue with platelets (thrombocytopenia), which are not about white blood cells. So the measure indicating a WBC count below 2.0 x10^9/L best defines leukopenia.

Leukopenia means a lower-than-normal white blood cell count. The normal range for white blood cells is about 4.0 to 11.0 x10^9/L. When the count drops below this range, it’s considered leukopenia, and its more severe form—below around 2.0 x10^9/L—significantly raises the risk of infections because there are fewer cells available to fight pathogens. The other options describe a high WBC count (leukocytosis), a normal WBC range, or an issue with platelets (thrombocytopenia), which are not about white blood cells. So the measure indicating a WBC count below 2.0 x10^9/L best defines leukopenia.