Autoimmune Neutropenia Updates: Etiology, Pathology, and Treatment

Autoimmune neutropenia (AIN) is defined as a neutrophil count <1.5 × 109/L caused by increased peripheral destruction of neutrophils from an underlying autoimmune mechanism in which autoantibodies are directed against a patient's own neutrophils. AIN has a multifactorial etiology ranging from an idiopathic primary phenomenon to secondary disorders associated with established autoimmune diseases. Primary AIN is more prevalent in children,...