A member asked:

What causes an avulsion fracture of the left anterior superior iliac sartorius?

A doctor has provided 1 answer

Sudden muscul force: The mechanism of injury in apophyseal avulsions is sudden forceful concentric or eccentric muscle contraction during running, jumping or kicking a ball, which results in traction on the unfused apophysis. Extreme passive stretching and chronic repetitive microtrauma have also been implicated in the development of apophyseal avulsion.

Answered 10/14/2012

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