Question: what causes high white blood cell count in newborns?
Answer: Leukocytosis refers to an increase in the total number of white blood cells, usually it is physiological or infectious in neonate and the counts rarely exceed 30,000/mm3. Hyperleukocytosis (WBC > 100,000/mm3) is rare and can be due to leukaemia, leukocyte adhesion defect and myeloproliferative disorders.