Complex de novo chromosomal rearrangement at 15q11-q13 involving an intrachromosomal triplication in a patient with a severe neuropsychological phenotype: clinical report and review of the literature.

Abstract excerpt

Interstitial triplications of 15q11-q13, leading to tetrasomy of the involved region, are very rare, with only 11 cases reported to date. Their pathogenicity is independent of the parental origin of the rearranged chromosome. The associated phenotype resembles, but is less severe, than that of patients bearing inv dup(15) marker chromosomes. Here, we describe a boy of 3 years and 9 months of age who exhibited...

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