Chromosome 15q11-Q13 Duplication Syndrome, also known as 15q11q13 microduplication syndrome, is related to prader-willi syndrome and angelman syndrome. An important gene associated with Chromosome 15q11-Q13 Duplication Syndrome is UBE3A (Ubiquitin Protein Ligase E3A). The drugs Fenfluramine and Stiripentol have been mentioned in the context of this disorder. Affiliated tissues include testes and skin, and related phenotypes are intellectual disability and hypotonia