Hi there! My mother just received results of a blood test showing 2.700 in white blood cells. If I recall the normal is above 4.500 I wanted to ask what could be the cause of this. She has this problem for over 20 years. the usual results she gets are from 2.800 to 3.200 (once she got 3.400). The last one is 2.700 What could be the cause of this? ... more