Representative X-ray appearance of a primary benign bone tumor - Aneurysmal Bone Cyst 

 • Soft tissue swelling (best seen by comparing left & right sides together)

 • Joint Space Narrowing

 • Bony Erosions (occurs at the exposed corners of the articular bone)

 • Peri-articular osteopenia (bones look more lucent closer to the joints)

 • Joint Subluxations (Joint deformities that can still be reduced. Best visualized with multiple x-rays taken at different planes)



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