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.