Chromosome 17q23.1-Q23.2 Deletion Syndrome, also known as 17q23.1q23.2 microdeletion syndrome, is related to progressive myoclonus epilepsy 1b and vertical talus, congenital. An important gene associated with Chromosome 17q23.1-Q23.2 Deletion Syndrome is DEL17Q23.1Q23.2 (Chromosome 17q23.1-Q23.2 Deletion Syndrome). Affiliated tissues include heart and lung, and related phenotypes are delayed speech and language development and moderate global developmental delay