Chromosome Xp11.23-P11.22 Duplication Syndrome, is also known as microduplication xp11.22p11.23 syndrome, and has symptoms including hoarseness An important gene associated with Chromosome Xp11.23-P11.22 Duplication Syndrome is DUPXP11.23P11.22 (Chromosome Xp11.23-P11.22 Duplication Syndrome). Related phenotypes are intellectual disability and delayed speech and language development