The Hunka classification is used to grade the residual anatomical deformity of the proximal femur following a septic hip in the pediatric population based on changes to the femoral head and stability of the hip.
Classification
type I: absent or minimal femoral head changes
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type II:
IIa: deformity of the femoral head with an intact physis
IIb: deformity of the femoral head with premature physeal closure
type III: pseudoarthrosis of the femoral neck
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type IV:
IVa: complete destruction of the capital femoral epiphysis with a stable neck fragment
IVb: complete destruction of the capital femoral epiphysis with a small unstable neck fragment
type V: complete destruction of both the femoral head and the femoral neck to the intertrochanteric line with hip dislocation