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  • Title: De novo 15q13.3 microdeletion with cryptogenic West syndrome.
    Author: Lacaze E, Gruchy N, Penniello-Valette MJ, Plessis G, Richard N, Decamp M, Mittre H, Leporrier N, Andrieux J, Kottler ML, Gerard M.
    Journal: Am J Med Genet A; 2013 Oct; 161A(10):2582-7. PubMed ID: 23929658.
    Abstract:
    West syndrome is a well-recognized form of epilepsy, defined by a triad of infantile spasms, hypsarrhythmia and developmental arrest. West syndrome is heterogenous, caused by mutations of genes ARX, STXBP1, KCNT1 among others; 16p13.11 and 17q21.31 microdeletions are less frequent, usually associated with intellectual disability and facial dysmorphism. So-called "idiopathic" West syndrome is of better prognostic, without prior intellectual deficiency and usually responsive to anti-epileptic treatment. We report on a boy falling within the scope of idiopathic West syndrome, with no dysmorphic features and normal development before the beginning of West syndrome, with a good resolution after treatment, bearing a de novo 15q13.3 microdeletion. Six genes are located in the deleted region, including CHRNA7, which encodes a subunit of a nicotinic acetylcholine receptor, and is frequently associated with epilepsy. Exploration of the 15q13.3 region should be proposed in idiopathic West syndrome.
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