enchondroma

enchondroma A common benign tumor of cartilage within bone. Enchondroma most often appears as a bony nodule in the hand or foot of a patient aged 10 to 30 years. Pain may be a sign of a fracture or malignant transformation. If fracture occurs, the enchondroma may be treated with removal and bone grafting. No treatment is needed if there are no symptoms. Enchondromas rarely become malignant as chondrosarcomas.