The patient's white blood cell (WBC) level is 4000 cells/microliter. The differential shows a neutrophil count of 65% and a band level of 5%. The absolute neutrophil count is
a. 4000 cells/microliter.
b. 3000 cells/microliter.
c. 2800 cells/microliter.
d. 2600 cells/microliter.
C
The differential demonstrates the percentage of each type of WBC circulating in the bloodstream. The absolute neutrophil count is calculated by multiplying the total WBC count (without a decimal point) by the percentages (with decimal points) of polymorphonuclear leukocytes (polys; also called segs or neutrophils) and bands (immature neutrophils).
WBC (segs + bands)
This gives an actual number that is translated into the categories of mild, moderate, or severe neutropenia.
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