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Does myotonic dystrophy affect children differently than adults?

Myotonic dystrophy affects children differently than adults-congenital myotonic dystrophy type 1 (DM1), seen in infants born to women with DM1, is more severe than adult-onset DM1 and myotonic dystrophy type 2 (DM2). Newborns with congenital DM1 have very weak muscles, so they have difficulty breathing and problems with swallowing and sucking. They may also have mental retardation. However, babies born with congenital DM2 do not have myotonia.

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