Chondrosarcoma is a type of bone cancer originating in cartilage-producing cells. It represents approximately 30% of all bone sarcomas. It is often resistant to traditional cancer treatments like chemotherapy and radiotherapy. It can occur at any age, and is most often found in the axial skeleton (spine, skull). Diagnosis involves imaging and biopsy. Treatment primarily involves surgery, with proton therapy showing promise. Prognosis varies significantly depending on the tumor's grade.