Question:
Blount's disease is:
Blount's disease is:
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Tibia vara means the leg bows outward at the knee.
Updated On: Jun 24, 2026
- Genu valgum
- Genu varum
- Genu recurvatum
- Meniscal injury
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The Correct Option is B
Solution and Explanation
Step 1: Blount's disease is also called tibia vara. It is a growth disorder of the proximal tibial physis (growth plate).
Step 2: The medial part of the upper tibia, just below the knee, fails to develop normally because of abnormal load on the growth plate. This causes the lower leg to angle inward.
Step 3: Inward angulation of the leg at the knee (the apex of the deformity points away from the midline) is genu varum, i.e. a bow-leg deformity. Hence Blount's disease produces genu varum.
Step 4: Unlike physiological bowlegs, which straighten as the child grows, Blount's disease is progressive and can cause severe bowing of one or both legs. It is more common in obese children, early walkers, and African-American children.
Step 5: Eliminating the others: genu valgum is a knock-knee (inward-pointing knees), genu recurvatum is backward hyperextension of the knee, and meniscal injury is a soft-tissue tear, none of which describe Blount's disease.
Answer: Genu varum (option B). This matches the printed key.
Step 2: The medial part of the upper tibia, just below the knee, fails to develop normally because of abnormal load on the growth plate. This causes the lower leg to angle inward.
Step 3: Inward angulation of the leg at the knee (the apex of the deformity points away from the midline) is genu varum, i.e. a bow-leg deformity. Hence Blount's disease produces genu varum.
Step 4: Unlike physiological bowlegs, which straighten as the child grows, Blount's disease is progressive and can cause severe bowing of one or both legs. It is more common in obese children, early walkers, and African-American children.
Step 5: Eliminating the others: genu valgum is a knock-knee (inward-pointing knees), genu recurvatum is backward hyperextension of the knee, and meniscal injury is a soft-tissue tear, none of which describe Blount's disease.
Answer: Genu varum (option B). This matches the printed key.
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