Definition: Measures essential components of the blood. Substance What It Is Reference Ranges * What a Low Number May Mean What a High Number May Mean. USA UK/EU Australia/Canada. White blood cell count (WBC) Measures the total number of white blood cells, which defend the body. against infection; there are several different types of white blood cells:
Shen Z-X, Chen G-Q, Ni J-H, et al. Use of arsenic trioxide (AS 2 O 3) in the treatment of acute promyelocytic leukemia (APL). ii. Clinical efficacy and pharmacokinetics in relapsed patients.
(See Clinical features and diagnosis of hemophagocytic lymphohistiocytosis, section on 'Evaluation and diagnostic testing' and 'Hematologist referral and pretreatment testing' below.). The goal of therapy for patients with HLH is to suppress life-threatening inflammation by destroying immune cells.