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Blount's disease (congenital tibia vara)

Case contributed by Ali Abougazia
Diagnosis certain

Presentation

History of bowed legs for 5 years.

Patient Data

Age: 10 years
Gender: Female
  • fragmentation of medial tibial epiphysis on both sides
  • irregular medial physeal line on both sides
  • beaking of proximal medial tibial metaphysis on both sides
  • bone bridge across the medial physis on the left side
  • metaphyseal-diaphyseal angle (MDA) >11° on both sides (22° on right and 45° on left)
  • tibiofemoral angle (TFA) >15°  on both sides; tibia vara (37° on right and 39° on left)

Case Discussion

Findings are consistent with infantile form of Blount's disease  (also known as tibia vara) which refers to a local disturbance of growth of the medial proximal tibial epiphysis.

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