MRI scan is the best way to locate
multiple sclerosis (MS) lesions (also called plaques)
in the brain or spinal cord. An MRI scan is abnormal in more than 95% of people recently diagnosed with MS.1
But abnormal MRI results do not always mean that you have
MS. Abnormalities show up on scans from many illnesses other than MS. An
abnormal finding on an MRI scan alone is not enough to diagnose MS. Your doctor
will confirm a diagnosis of MS based on your symptoms, your neurological
exam, and the results from an MRI and other tests.
In some ways, each person with multiple sclerosis lives with a different illness. Although nerve damage is always involved, the pattern is unique for each individual with MS.
Specific experiences with MS may vary widely, but doctors and researchers have identified several major types of MS. The categories are important because they help predict disease severity and response to treatment.
When abnormal MRI results occur along with a medical history,
abnormal nervous system exam, and other test results that are typical of MS, it
is very likely that you have MS.
If you have already been diagnosed with MS, MRI scans can sometimes
distinguish new lesions from older ones and can help your doctor(s) follow the
progress of the disease. Continuing to have periodic MRI scans if you have
relapsing-remitting MS may help identify new lesions
even when you are not having symptoms from those new lesions.
If you have had just one episode of MS-like symptoms and are trying
to decide whether to start treatment with medicine, MRI scans can be
helpful in assessing the progress of the disease. If new lesions are developing
or if existing lesions are growing—regardless of whether you have had further
episodes of MS symptoms—most doctors will recommend that you begin treatment.
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
March 12, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this