Radial head fracture

Discussion:
The anterior and posterior sail signs are very helpful and indicate the presence of an elbow joint effusion, which in the setting of trauma should instigate a careful scrutiny for a fracture. In this case, the fracture is obvious, however in many cases the fracture can be very subtle or even not visible, in which case either conservative management including a follow up x-ray or a concurrent CT would be suggested.
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