5 Facts you should know about

Myotonic dystrophy type 1

Myotonic Dystrophy (DM1) is caused by mutations in the dystrophia myotonica protein kinase (DMPK) gene

More than 100,000 people across the United States, Europe, and Japan have DM1.

The disease affects multiple organ systems, progressive muscle loss, and weakness, often including myotonia

Patients experience reduced quality of life and shortened life expectancy

DM1 has several forms, which range in age of presentation and severity, including congenital, infantile, juvenile, and adult (classic)

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