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Becker muscular dystrophy is related to Duchenne muscular dystrophy in that both result from a mutation in the dystrophin gene, however the hallmark of Becker is milder in-frame deletions. [4] and hence has a milder course, with patients maintaining ambulation till 50–60 years if detected early. [7] [8]
The majority of muscular dystrophies are inherited; the different muscular dystrophies follow various inheritance patterns (X-linked, autosomal recessive or autosomal dominant). In a small percentage of patients, the disorder may have been caused by a de novo (spontaneous) mutation. [9] [10]
Myotonia congenita is a congenital neuromuscular channelopathy that affects skeletal muscles (muscles used for movement). It is a genetic disorder.The hallmark of the disease is the failure of initiated contraction to terminate, often referred to as delayed relaxation of the muscles and rigidity. [1]
In 1986, MDA-funded researcher Louis M. Kunkel identified the dystrophin gene, the gene for Duchenne muscular dystrophy (DMD) and Becker muscular dystrophy (BMD). [51] MDA funded the first gene therapy trial in 1999, followed by the first vector based gene therapy trial for DMD in 2006. [52]
Duchenne muscular dystrophy is the most common type of muscular dystrophy, [3] with a median life expectancy of 27–31 years. [5] [11] However, with comprehensive care, some individuals may live into their 30s or 40s. [3] Duchenne muscular dystrophy is considerably rarer in females, occurring in approximately one in 50,000,000 live female ...
Peter Emil Becker (23 November 1908 – 7 October 2000) was a German neurologist, psychiatrist and geneticist. [1] He is remembered for his studies of muscular dystrophies. Becker's muscular dystrophy (OMIM 300376) and Becker myotonia (OMIM 255700) are named after him.
DM1 is the most common form of myotonic muscular dystrophy diagnosed in children, with a prevalence ranging from 1 per 100,000 in Japan to 3–15 per 100,000 in Europe. [13] The prevalence may be as high as 1 in 500 in regions such as Quebec, possibly due to the founder effect. The incidence of congenital myotonic dystrophy is thought to be ...
Emery–Dreifuss muscular dystrophy (EDMD) is a type of muscular dystrophy, a group of heritable diseases that cause progressive impairment of muscles. EDMD affects muscles used for movement (skeletal muscles), causing atrophy, weakness and contractures. It almost always affects the heart, causing abnormal rhythms, heart failure, or sudden ...