Chromosome 7q11.23 Deletion Syndrome, Distal, 1.2-Mb, also known as distal 7q11.23 microdeletion syndrome, is related to williams-beuren syndrome. An important gene associated with Chromosome 7q11.23 Deletion Syndrome, Distal, 1.2-Mb is DEL7Q11.23 (Chromosome 7q11.23 Deletion Syndrome, Distal, 1.2Mb). Related phenotypes are intellectual disability and seizure