A 3-year-old demonstrates lateral bowing of the tibia. Which of the following signs would indicate that the boy's condition is Blount disease rather than just the more typical developmental genu varum?
a) The condition is bilateral
b) The medial surfaces of the knees are more than 2 in apart
c) The malleoli are touching
d) A sharp, beaklike appearance to the medial aspect of the proximal tibia on x-ray
Answer: d)A sharp, beaklike appearance to the medial aspect of the proximal tibia on x-ray
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