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.
In acute promyelocytic leukemia, immature white blood cells called promyelocytes accumulate in the bone marrow. The overgrowth of promyelocytes leads to a shortage of normal white and red blood cells and platelets in the body, which causes many of the signs and symptoms of the condition.