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Blount Disease eMedicine Radiology (Visit this link)
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A brief overview of normal age-related angulation changes in the knee joint helps improve understanding the disease process. A pronounced varus angulation is seen in newborns and in children younger than 1 year. Varus angulation is believed to be secondary to in utero molding of the lower extremities, and this gradually resolves after children start walking. Varus angulation is usually corrected by the time children reach an approximate age of 18-24 months or after approximately 6 months of walking. From that time on, during the second and the third years, pronounced valgus angulation changes occur. The valgus position is partially corrected in the following years, reaching the adult pattern of mild valgus of the knees by age of 6-7 years. Thus, any varus angulation at the knee joint seen in individuals older than 2 years is abnormal; this finding is the basis for diagnosing tibia vara, or Blount disease.
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Added: Tue Jul 10 2007
