Caused by mutation in the SH3 and multiple ankyrin repeat domains 3 gene (SHANK3, 606230.0001) [MOLECULAR BASIS] Contiguous gene syndrome caused by deletion (160kb to 9Mb) of 22q13.3 (in some patients) [MISCELLANEOUS] Wide phenotypic variation [MISCELLANEOUS] Some patients do not have dysmorphic features [MISCELLANEOUS] De novo mutation [MISCELLANEOUS]
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