Approximately 2 million people in the world suffer from<unk>  sclerosis<unk>  cases make up 1 to 2 of every 1000<unk>  sclerosis cases. This means that only around 2000 people in the world suffer of<unk>  MS. Of those cases, there is a higher percentage of females affected than males. The median age of onset is 37 years. As in general MS, there are differences for gender, ethnicity and geographic location. Based on epidemiological studies, there are about 3 times more female MS patients than male patients, indicating a possibility of an increased risk due to hormones. Among different ethnic groups, MS is the most common among Caucasians and seems to have a greater incidence at latitudes above 40° as compared to at the equator. While these associations have been made, it is still unclear how they result in an increased risk of MS onset.
Tumefactive multiple sclerosis
CMV polyradiculomyelopathy
Paraneoplastic cerebellar degeneration
Post viral cerebellar ataxia
Juvenile primary lateral sclerosis
Malignant multiple sclerosis
Viliuisk encephalomyelitis
Chronic inflammatory demyelinating polyneuropathy