Why get tested?
To diagnose a disease or condition affecting the central nervous system (CNS) such as bleeding within the brain or skull, cancer, autoimmune disorder or infection

When to get tested?
When your doctor suspects that your symptoms are due to a condition or disease involving your central nervous system

Sample required?
A sample of cerebrospinal fluid (CSF) is collected by a doctor from the lower back using a procedure called a lumbar puncture or spinal tap.