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- Malignant tumors of hand extremely rare
- Most common is chondrosarcoma due to malignant transformation of pre-existing enchondroma
- Enchondroma turning malignant most common in Ollier disease (multiple enchondromas)
- Quite often diagnosed as late as 10 years after onset. No specific clinical symptoms
- Rarely ever metastasize, so local amputation is done to avoid recurrence
Imaging
- Metacarpal or phalangeal chondral tumor usually seen in proximal phalanx
- Essentially indistinguishable from encondromas which are expansile and can show deep cortical scalloping
- Presence of focal osteolysis and soft tissue calcification should point towards malignant change