Normal range: CSF IgG: 3% to 12% of total CSF protein. IgG in CSF is normally < 5 mg/dL
Comment: To assist in the interpretation of elevated CSF protein. Differential diagnosis of intrathecal synthesis of IgG from increased meningeal and vascular permeability, haemorrhage or traumatic tap. A raised CSF/serum protein ratio may occur in multiple sclerosis, and oligoclonal bands are found in 90% of patients with this disease
Sample: CSF