Werdnig-Hoffman disease
 (also known as "Infantile spinal muscular atrophy", "spinal muscular atrophy type 1", or "spinal muscular atrophy type I")) is an autosomal 
recessive muscular disease and is the most severe form of spinal 
muscular atrophy. It is evident before birth or within the first few months of life. There
 may be a reduction in fetal movement in the final months of pregnancy. The condition tends to deteriorate over time, 
depending on the severity of the symptoms. Affected  children never sit 
or stand and usually die before the age of 2, if not provided breathing 
support. However, some  individuals have survived to become adults.







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