Amyotrophic lateral sclerosis 4: ALS4. A juvenile-onset form of amyotrophic lateral sclerosis (ALS) with no bulbar involvement, inherited in an autosomal dominant manner and caused by mutation in a gene on chromosome 9q34.
Quick GuideDementia, Alzheimer's Disease, and Aging Brains
Subscribe to MedicineNet's General Health Newsletter
Brain and Nervous System Resources
Last Editorial Review: 6/9/2016