Cerebrospinal fluid
Cerebrospinal fluid is a clear bodily fluid that occupies the subarachnoid space and the ventricular system around and inside the brain. It is revealed that 70–80% of Parenchymal NBD patients show altered CSF constituents. The observed different is 1) Elevated CSF protein concentration (1 g/dL), 2) Absence of oligoclonal band, and 3) elevated CSF cell count (0–400×10⁶ cells/L) in the body.