One monozygotic twin is afflicted with arthrogryposis multiplex congenita. A review of the literature has revealed an apparently inconsistent pattern of transmission, conflicting views as to the primary site of involvement, a wide spectrum of variably associated congenital anomalies, and a postulated link with other identified neurologic disorders. We support the proposal that arthrogryposis is a sign present in several syndromes, probably of differing etiologies. Classification under this purely descriptive term should be avoided.
Pedreira FA, Long RE. "Arthrogryposis Multiplex Congenita" in One of Identical Twins. Am J Dis Child. 1971;121(1):64-66. doi:10.1001/archpedi.1971.02100120100016