Though exact concentrations differ based on the specific disease, mild cases of<unk>  are considered to begin when lymphocyte counts enter the range of 10-100 cells per mm3. In healthy individuals, only 0-5 white blood cells per µL are normally present in the CSF. In patients suffering from pseudomigraines, studies have shown concentrations ranging from 10-760 cells per mm3, with a mean concentration of 199 ± 174 cells per mm3. Increases in white blood cell count to more than 500 cells per mm3 can cause the CSF to appear cloudy when observed during diagnostic tests. The rise in concentration corresponds to an inflammatory immune response typically seen during viral infections. Despite their diversity, diseases featuring<unk>  share a number of symptoms, most notably headaches and neurological deficits.
Lymphocytic pleocytosis
Monocytosis
Macrocytosis
Poikilocytosis
Anisocytosis
Oligoclonal band
Neuroacanthocytosis
Mastocytosis