Blount disease

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Leg bowing.

Patient Data

Age: 4 years
Gender: Female
x-ray

The frontal view of the knees demonstrate:

  • bilateral tibia vara
  • decreased thickness with flattening of the medial tibial epiphyses
  • depressed medial tibial metaphyses with a beak-shape appearance
  • compensatory hypertrophy of the medial femoral condyles
  • the metaphyseal-diaphyseal angle of Drennan was at 22º on the right and 23º on the left

Case Discussion

Radiographic features of Blount disease.

Blount disease is commonly bilateral and characterized by a local disturbance of growth of the medial aspect of the proximal tibial metaphysis and/or epiphysis that results in tibia vara. 

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