At a Glance Neutrophilia is defined as an absolute neutrophil count (ANC) greater than 2SD above the mean for the patient population. Typically, this represents a neutrophil count greater than 7700/microliter (µL). Note that a finding of neutrophilia should not be based on a differential count reported in percentages. Depending on the total white cell…
At a Glance Lymphocytosis is defined as a peripheral blood lymphocyte count greater than 2SD above the mean for the patient population. As lymphocyte counts vary with age, the diagnosis must be made using age specific normal ranges. In adults, an absolute lymphocyte count greater than 4000 per microliter is generally considered lymphocytosis. Note that…
At a Glance Monocytosis is defined as an absolute monocyte count greater than 2SD above the mean for the patient population. Typically, this represents a monocyte count greater than 800 per microliter in adults. Monocyte counts may be significantly higher in children (e.g., up to 3000 per microliter), and age-specific normals should be used to…
At a Glance Eosinophilia is defined as an absolute eosinophil count greater than 2SD above the mean for the population being tested. Typically, this represents an absolute peripheral blood eosinophil count greater than 500 cells/microliter (µL). Peripheral blood eosinophilia may be further categorized as mild (500-1,500 eosinophils/µL), moderate (1,500-5,000 eosinophils/µL), or severe (>5,000 eosinophils/µL). This…
