Chondrosarcoma, a malignancy arising from cartilage cells, commonly occurs in the pelvis and long bones of extremities but rarely in the head and neck.

• 摘要软骨肉瘤是软骨母细胞之恶性肿瘤，常发生于髋骨、四肢之长骨及胸、肋骨等，少见于头颈部。