Osteoid osteoma

Discussion:

Osteoid osteoma typically affects young individuals. Typical radiological appearance is a small well defined lucency with a small central nidus and surrounding periosteal reaction with or without soft tissue reaction. The patients present with pain, more in night that is typically relieved by salicylates. When occurring close to a joint the clinical presentation can mimic that of inflammatory arthritis or synovitis as in this case.

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