Contiguous gene syndrome caused by deletion of the paternal allele of the imprinted region at 15q11.2 [MOLECULAR BASIS] Unusual skill with jigsaw puzzle [MISCELLANEOUS] Imprinted disorder [MISCELLANEOUS] Rare cases secondary to chromosome translocation [MISCELLANEOUS] Most cases due to interstitial deletions, the remainder of cases are secondary to maternal disomy [MISCELLANEOUS]
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