Epidemiology
Most common bony tumour of hand
Risk malignant transformation isolated lesion is < 2%
- more likely in long bones than hands
Site
Proximal phalanx > middle
Syndromes
Ollier's
- multiple enchondromatosis
- risk of transformation 10 - 25%
Maffuci's
- enchondromas and hemangiomas
- risk transformation close to 100%
Prognosis
Observation unless
- pain
- aggressive X-ray changes
- increased uptake on bone scan
Biopsy to exclude malignancy
Pathological fracture
Allow fracture to heal
- enchondroma does not resolve
Curette and bone graft at a later date