1. Giant cell tumour
Often present with a painful swollen area, lytic on X-ray
- calcaneus > talus
- rare in skeletally immature
- curettage and grafting
- local recurrence ~50 %
- may need to bone graft defects
2. Osteochondromas
Can occur in foot and ankle
- single or multiple
- simple excision at base
- malignant transformation very rare in foot
Subungal exostosis
- under the toenail (esp 1st)
3. Osteoid osteoma
Especially in hindfoot
- difficult to diagnose on x-ray
- CT / MRI / bone scan
- excision / RF ablation (CT guided)
Enchondroma
4. UBC
Infrequent in foot
- calcaneum
- UBC can become symptomatic from stress fractures
- treat with curettage and BG
5. ABC
Originate in metaphyseal bone
- MT most common foot site (also calcaneus)
- treat with curettage and BG / excision
