Chondrosarcoma is not only resistant to chemotherapy but also responds poorly to radiotherapy (radiation therapy).
However, radiatio (in this case, proton therapy) may be considered in the following cases:
- Inoperable chondrosarcoma
- Chondrosarcoma was removed not far in the healthy.
Thus, local tumor control can be achieved in approximately 30-50% of cases over a period of three to five years.