Chromosome 8q21.11 Deletion Syndrome, also known as 8q21.11 microdeletion syndrome, is related to peters-plus syndrome and hypotonia. An important gene associated with Chromosome 8q21.11 Deletion Syndrome is DEL8Q21.11 (Chromosome 8q21.11 Deletion Syndrome), and among its related pathways/superpathways is Mesodermal commitment pathway. Related phenotypes are intellectual disability and ptosis