This disease is characterized by progressive muscle loss and weakness. Myotonic Dystrophy or dystrophia myotonica (DM) is a genetic disease characterized by progressive muscle degeneration. Myotonic muscular dystrophy is a common multi-system disorder that affects the skeletal muscles (the muscles that move the limbs and trunk) as well as smooth muscles (the muscles that control the digestive system) and cardiac muscles of the heart. It is estimated that the condition affects about one in 8,000 people worldwide. There are nine different types of MD: Myotonic: Most common MD in both men and women. Myotonic Dystrophy is a tri-nucleotide repeat, autosomal dominant disease characterized by an inability to relax (myotonia) and muscle wasting (muscular dystrophy). DM is divided into two types: type 1 affects a gene called DMPK on chromosome 19, and type 2 affects a gene on chromosome 3 called ZNF9. 800-572-1717 | [email protected] Muscular dystrophy (MD) refers to a group of nine genetic diseases that cause progressive weakness and degeneration of muscles used during voluntary movement. Myotonic dystrophy may be further classified into two types, and the two types may affect different muscles. Muscular dystrophy (MD) disease in the U.S. affects 1 in 50 million girls and 1 in 5,600 to 7,000 males from ages 5 to 24. As with other types of muscular dystrophy, myotonic dystrophy involves progressive muscle weakness and muscle wasting. Approximately 1 in 8,000 people have myotonic dystrophy.. Myotonic dystrophy. Muscular Dystrophy Association National Office. Other types of muscular dystrophy, including limb-girdle, myotonic, fascioscapulohumeral (FSHD), and congenital MD, can affect both men and women. There are two types of myotonic muscular dystrophy, described as type 1 (DM 1) and type 2 (DM 2). Electrodiagnostic and genetic testing help differentiate among the NDMs and between NDM and DM. Myotonic Dystrophy is a multi-system disease, which can initially present with symptoms of ptosis, ophthalmoplegia, extraocular myotonia, and decreased visual acuity. Myotonic muscular dystrophy is the most common form of muscular dystrophy that affects adults and is characterized by myotonia, a symptom involving prolonged muscle stiffening or spasms that worsen in cold temperatures, explains WebMD. The condition is progressive, so symptoms of muscle stiffness and weakness tend to worsen over time. 161 N. Clark, Suite 3550. It is the most common form of muscular dystrophy that begins in adulthood, usually in a person’s 20s or 30s. Myotonic dystrophy is a disease that affects the muscles and other body systems. Other symptoms include daytime sleepiness, cataracts and heart problems, notes the Muscular Dystrophy Association. When functionally debilitating, myotonia in from myotonic dystrophy type 1 and 2 (DM1 and DM2), which have significant, extra-muscular,systemicmanifestations.Onclinicalgroundsalone,thereisoftenanoverlap among DM2andNDM. Myotonic dystrophy (DM) is one of the muscular dystrophies. In the world, 1 in 3,500 males has MD. The frequency and predictors of NAFLD in this population have not been described. Myotonic muscular dystrophy, which is sometimes called myotonic dystrophy, is a type of muscular dystrophy. DM 1 is also called Steinert’s disease. General Overview. Myotonic dystrophy (DM1) is the most common form of adult-onset muscular dystrophy, and there is a high frequency of insulin resistance due to insulin receptor mRNA splicing defects in muscle tissue. It is the most common form seen in adults and is suspected to be among the most common forms overall. 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