Myotonic muscular dystrophy is the most common form of adult-onset muscular dystrophy. Facial and neck muscles are usually the first to be.
The CTG repeat size in adult onset is generally in the range of 50 to 1,000.1. The mild form of DM1 is characterized by mild weakness, myotonia, and cataracts.
Author(s): Rajashree Srinivasan, MD, Saylee Dhamdhere, MD, and The most common adolescent and adult onset muscular dystrophies.
The most common adult form of MD, myotonic MD appears in two forms, type 1 and type 2. Type 1 is more common and is caused by an abnormally large.