How is leukopenia diagnosed?
The number of white blood cells is counted by collecting a blood sample, then using a machine called an analyzer that counts different blood cells then classifies them according to their type.
The main drawback of the automated method is that it usually mistakes abnormal white blood cells and considers them normal, therefore overestimating the number of true cells, and that’s why most CBCs will be followed by a manual blood film examination under the microscope by a clinical pathologist.