1a: No proximal tibia visible on radiograph. Extensor mech absent. Hypoplastic distal femoral epiphysis
1b- Proximal tibia eventually ossifies and extensor mechanism will function. Distal femoral epiphysis appears normal
2- Proximal tibia present at birth but short tibia
3- diaphyseal and distal tibia present but proximal tibia absent
4- short tibia, fibula migrated proximal, diastasis of distal tib-fib joint
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A 13-month-old boy has shortening and deformity of the right leg. A clinical photograph and radiograph are provided in Figures A and B. Which of the following findings most predictive of a good outcome with a Syme amputation?
35 degree flexion contracture
Absence of tibiofibular synostosis
Full functional quadriceps strength
Family history of tibial hemimelia
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