Scheduled maintenance is planned for Jan. 31–Feb. 1. You may experience brief interruptions during this time.
Individuals, typically of African or Middle Eastern ancestry, may present with an absolute neutrophil count (ANC) < 1,500 cells per μL with no signs of recurrent infections, immunocompromise, or malignancy. Frequently, the lower ANC is a normal variant associated with the red blood cell Duffy-null phenotype [Fy(a-b-)] that should be confirmed by blood bank phenotyping. Asymptomatic Duffy-null individuals do not require additional testing and should not be denied clinical trial participation or prescription of certain medications (including chemotherapy) based on ANC alone.