A very rare, multiple congenital contractures syndrome characterized by a microstomia with a whistling appearance of the mouth, distinctive facies, club foot and joint contractures. FSS is the most severe form of distal arthrogryposis. The disease is MONDO_0008675 (Freeman-Sheldon syndrome). Also known as: Craniocarpotarsal dysplasia, Craniocarpotarsal dystrophy, Freeman Sheldon Syndrome, Freeman Sheldon syndrome, arthrogryposis, distal, type 2A (Freeman-Sheldon), cranio-carpo-tarsal syndrome, craniocarpotarsal dysplasia, craniocarpotarsal dystrophy.