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Metachromatic leukodystrophy
This rare genetic disorder causes fatty substances (sulfatides) to build up in your brain and nervous system, causing progressive loss of nerve function.
Movement disorders
Learn about the different types of neurological conditions that affect movement.
Multiple myeloma
Learn about this cancer that forms from white blood cells called plasma cells. Treatments include medicines and bone marrow transplant.
Multiple sclerosis
This nervous system disorder causes a range of symptoms — and while there's no cure, it's possible to have long periods of remission.
Multiple system atrophy (MSA)
This rare neurological disorder affects the body's neurologic control of movement and blood pressure.
Neuromyelitis optica
Understand more about this condition that affects the spinal cord and eye nerves and is sometimes mistaken for multiple sclerosis.
Nicotine dependence
Nicotine dependence can be tough to kick, but treatments and resources are available to boost your chances of success.
Orchitis
This inflammation of one or both testicles can cause pain and infertility. It's usually caused by a bacterial infection or the mumps virus.
Osteomyelitis
Bones don't easily get infected, but certain situations, such as a serious injury, bloodstream infection or surgery, may lead to a bone infection.
Overactive bladder
Learn how you can get relief for sudden urges to urinate, which may point to overactive bladder or urinary incontinence.
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