Caused by mutation in the nuclear receptor binding SET domain protein 1 (NSD1, 606681.0011) [MOLECULAR BASIS] Most cases are isolated [MISCELLANEOUS] Caused by mutation in the KCNQ1-opposite strand/antisense transcript 1 gene (KCNQ1OT1, 604115.0001) [MOLECULAR BASIS] Caused by contiguous gene duplication of imprinted region of 11p15.5 [MOLECULAR BASIS] Imprinted disorder [MISCELLANEOUS] Caused by mutation in the cyclin-dependent kinase inhibitor 1C gene (CDKN1C, 600856.0001) [MOLECULAR BASIS] Caused by contiguous gene deletion of imprinted region of 11p15.5 [MOLECULAR BASIS] Wide phenotypic spectrum [MISCELLANEOUS] Associated with assisted reproductive technologies [MISCELLANEOUS] Imprinting at 11p15.5 [MISCELLANEOUS] Occurs in 1 in 10,500 live births [MISCELLANEOUS]
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