Answer:
Chrondrosarcoma is the most common primary malignant bone tumor that occurs in the hand. The lesion most commonly occurs in patients over the age of 60. The proximal phalanges and metacarpals are most commonly affected. Radiographs typically reveal a tumor matrix with stipple calcifications, areas of lysis, and poorly defined borders. Histologically these tumors appear as a cartilaginous neoplasm with increased cellularity, pronounced cytologic atypia, and large binuclei. The majority of chondrosarcomas are slow-growing lesions that do not metastasize. Chrondrosarcomas are best treated surgically with wide en bloc excision or digit or ray amputation. Chemotherapy is not known to be effective. There is no role for radiation.