• proteins
  • Taking samples of cerebrospinal fluid may also reveal siderosis through xanthochromia, elevated presence of red blood cells, high iron and ferritin concentrations, and elevated levels of the proteins Tau, beta amyloid (Aβ42), neurofilament light protein (NFL), and glial fibrillary acidic protein (GFAP), but the CSF is sometimes normal. (wikipedia.org)