What does elevated red cells & elevated white cells mean in blood tests?

Cytosis. Erythrocytosis and leukocytosis mean elevation of the rbc and WBC counts respectively above the reference values of the lab. Slight increase could be physiologic reactions but usually when leukocytosis is accompanied by fever, it signifies infection. In your body. Elevation of rbc or WBC with many persistent abnormal young forms could mean early dysplasia or leukemia.