About The Medical Condition Spinal Muscular Atrophy, Type I
Find the definition of the medical term Spinal Muscular Atrophy, Type I. Spinal Muscular Atrophy, Type I defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.
Spinal Muscular Atrophy, Type I
| Spinal Muscular Atrophy, Type I Medical Condition |
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What's The Definition Of The Medical Condition Spinal Muscular Atrophy, Type I?
A group of recessively inherited diseases that feature progressive muscular atrophy and hypotonia. They are classified as type I (Werdnig-Hoffman disease), type II (intermediate form), and type III (Kugelberg-Welander disease). Type I is fatal in infancy, type II has a late infantile onset and is associated with survival into the second or third decade. Type III has its onset in childhood, and is slowly progressive. (J Med Genet 1996 Apr:33(4):281-3)
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