You may have heard your healthcare provider talk about clinically isolated syndrome (CIS). People who are diagnosed with CIS may or may not go on to develop MS.
CIS is the first occurrence of neurologic symptoms resulting from demyelination.
A protective material surrounds the nerve fibers in the central nervous system. This is known as the myelin sheath. Damage to the myelin sheath is called demyelination. This may disrupt nerve impulses that travel between cells in the brain or from the brain to the rest of the body.
A CIS episode can involve one or more symptoms:
CIS is a first event that lasts for at least 24 hours. Healthcare providers use a variety of methods to find out if it’s likely someone with CIS will develop MS. This includes magnetic resonance imaging (MRI), spinal taps, and other tests.
With an MRI scan, they’re looking for brain lesions similar to those found in people with MS.
Remember, early detection and treatment of CIS and relapsing MS are important. The right treatment may allow you to slow physical disability progression, reduce relapses, or reduce brain lesions. If you have any questions about CIS, be sure to talk to your healthcare provider.