This thumb x-ray is from a 15 year old patient who fell on his outstretched hand and sustained an injury to his left thumb. What can you see ?
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The x-ray shows avulsion fracture of the base of the medial aspect of proximal phalanx of the thumb.
This fracture is associated with an injury to the attachment of ulnar collateral ligament of the thumb MCP joint, thereby causing instability at the joint (Gamekeeper’s thumb).
The treatment for this injury is thumb spica and a referral to a hand surgeon.
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