Pathogenesis of infantile quadriceps fibrosis and its correction by proximal release.

Fifty-two extension contractures of the knee in 33 children are described. All subjects had severe illnesses in infancy requiring repeated intramuscular drug therapy, which led to muscle fibrosis and contractures. In early cases, through a limited subtrochanteric exposure, the contracted muscles can be released. Used in 14 cases, this new method has allowed early mobilization with excellent results.