Hematology
Absolute Lymphocyte Count (ALC)
Calculates the true number of lymphocytes in the blood.
&category=Hematology)
Enlarge
Parameters
Absolute Lymphocyte Count (ALC) Result
--
Formula
ALC (cells/µL) = [WBC (×10³/µL) × 1000] × (Lymphocyte % / 100)Clinical Pearls
Crucial for assessing immunocompromise. In HIV, the ALC can act as a surrogate marker for the CD4 count when exact flow cytometry is not immediately available.
Limitations
Normal ranges vary significantly by age (infants and young children naturally have much higher lymphocyte counts).