Dear friends and colleagues,
This 12-yo boy jumped over another football player and his flexed knee
directly fell on the ground. He immediately felt excruciating thigh pain.
I saw him 2 days later at ultrasound (fig 1 and 2) and found no tendon
avulsion and no myo-tendinous junction tear. The muscles were normal.
I was annoyed by a thin hypoechoic layer (yellow arrow) overlying the
cortex that was separated from the vastus medialis muscle by an echoic
layer (white arrow).
An MRI was obtained on the same day and showed a bright line at the
interface between the femoral cortex and the vastus medialis. No muscle
lesion.
I suspect this is a periosteal delamination tear (of the vastus medialis).
Would you agree ?
Is this frequent ?
What is the outcome (ossification ?)
Any ref from the literature ?
Tks for your help
Bruno Vande Berg
