Knock-knee deformity in children. Congenital and acquired.

The causes of knee valgus in children are multiple and complex. Physiologic knock knee, trauma, poliomyelitis, dysplasias, and infection all can be causative. One of the most interesting examples is the valgus that sometimes follows an undisplaced proximal tibial metaphyseal fracture. Treatment for all these entities can vary from doing nothing to corrective osteotomies, stapling of the medial epiphyseal plate, and bracing of the leg.