High cell counts are seen in conditions such as polycythemia (raised red blood cells) or leukemia (more white blood cells, especially in acute leukemic blast crises). May occur with a white blood cell count greater than 100,000/mm3 (100×109/L).
Hyperviscosity syndrome
Capillary leak syndrome
Macrophage activation syndrome
Culture-bound syndrome
Post-transfusion purpura
Systemic inflammatory response syndrome
EAST syndrome
Severe fever with thrombocytopenia syndrome