osteoid osteoma ( RID4005 )
The main differential considerations were osteoid osteoma / osteoblastoma and infection. Many favored infection because of a lucent tract extending toward the physis on XR (which was fibrous tissue on path). Due to the size it was opted to treat this by open excision rather than percutaneously. I am confused that such a large lesion would be signed out as osteoid osteoma and not osteoblastoma. Clinical presentation of severe pain, which was alleviated to some extent by NSAIDs is more suggestive of osteoid osteoma...I think.

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