Congenital dislocation of the hip associated with central core disease.

Central core disease is a congenital, non-progessive myopathy with proximal muscle weakness most prevalent about the pelvic girdle. Including out two patients there have been seven recorded cases of congenital hip dislocation associated with central core disease in children. Initial and recurrent contractures about the hip and knee should suggest the possibility of central core disease. However, the definitive diagnosis can only be made by muscle biopsy.