Contractures, Pterygia, and Spondylocarpotarsal Fusion Syndrome 1a, also known as multiple pterygium syndrome, autosomal dominant, is related to autosomal dominant polycystic kidney disease and hypocalcemia, autosomal dominant 1. An important gene associated with Contractures, Pterygia, and Spondylocarpotarsal Fusion Syndrome 1a is MYH3 (Myosin Heavy Chain 3). The drugs Angiotensin II and Candesartan cilexetil have been mentioned in the context of this disorder. Affiliated tissues include kidney and liver, and related phenotypes are short neck and hearing impairment