Xia-Gibbs Syndrome, also known as ahdc1-related intellectual disability-obstructive sleep apnea-mild dysmorphism syndrome, is related to hypotonia and contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a, and has symptoms including snoring An important gene associated with Xia-Gibbs Syndrome is AHDC1 (AT-Hook DNA Binding Motif Containing 1), and among its related pathways/superpathways is Mesodermal commitment pathway. Affiliated tissues include brain and eye, and related phenotypes are intellectual disability and hypotonia