Definition of Familial amyotrophic lateral sclerosis
Familial amyotrophic lateral sclerosis: Amyotrophic lateral sclerosis (ALS) in which there a family history of the disease. Familial ALS constitutes 5 to 10% of all cases of ALS. There are a number of different types of familial ALS.
They are known as ALS1, ALS2, and so on.
Last Editorial Review: 6/14/2012
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