Neutrophils (polymorphonuclear cells, PMNs, granulocytes, segmented neutrophils, segs) fight against infection and represent a subset of the white blood count. The ANC is the total number of neutrophil granulocytes present in the blood.
ANC > 1800/mm3: = normal
ANC < 1800/mm3: neutropenia
ANC = 1000-1800/mm3: mild neutropenia, low risk of infection
ANC = 500-1000/mm3: moderate neutropenia, moderate risk of infection
ANC < 500/mm3: severe neutropenia, high risk of infection
Reference: The Clinician's Ultimate Guide to Drug Therapy (www.globalrph.com)