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Myotonic Dystrophy Foundation
P.O. Box 29543
San Francisco, CA 94129
The Myotonic Dystrophy Foundation (MDF) is a voluntary organization that works closely with its medical and scientific advisors to accomplish its mission to lead and mobilize resources toward effective management, treatment, and ultimately a cure for myotonic dystrophy. MDF works to achieve this goal through education, advocacy, and research. Myotonic dystrophy type 1 (DM1) is an autosomal dominant, multi-system disorder that affects both smooth and skeletal muscles and may affect the central nervous system, heart, eyes, and/or endocrine systems. There are three types of DM1 that are distinguished by the severity of disease and age of onset. Mild DM1 is characterized by cataracts and sustained muscle contractions (myotonia). Classic DM1 is characterized by muscle weakness and wasting (atrophy), cataracts, myotonia and abnormalities in the heart’s conduction of electrical impulses. Congenital DM1 is characterized by muscle weakness (hypotonia), difficulty breathing, mental retardation and early death.
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