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Foot & Ankle Unit
| Question | Answer |
|---|---|
| bone cyst | well circumscribed lucency |
| chrondrosarcoma | bone destruction with calcifications in cartilaginous tumor |
| ewing sarcoma | ill-defined area of bone destruction with surrounding "onion peel" |
| gout | uric acid deposits in joint space; destruction of joint space |
| lisfranc joint injury | abnormal separation or avulsion fx between base of the 1st and 2nd metatarsal and cuneiforms |
| paget disease | mixed areas of sclerotic and cortical thickening and lytic or radiolucent lesions; cotton wool appearance |
| reiter syndrome | asymmetric erosion of joint spaces; calcaneus erosion, usually bilateral |