Why do osteoid osteomas have an excellent response to NSAIDs?
Osteoid osteomas promote extremely high levels of Prostaglandin E2 within the affected bone. NSAIDs block the creation of new prostaglandins providing pain relief.
An osteoblastoma is a similar appearing bone lesion but can be identified based on?
Size >2cm, Reduced response to NSAIDS, And osteoblastomas will enlarge over time.
Post ablation changes are visible 3 months following radio frequency ablation. Central nidus is now absent and there is T2 hyper intensity in the bone marrow surrounding RFA site.