Not necessarily. This primarily depends on the surgical outcome. If the tumor is completely removed without any residual lesions, chemotherapy may not be required. If there are residual lesions, chemotherapy might be considered, but it also depends on whether the sarcoma is sensitive to chemotherapy. If evaluation indicates sensitivity to chemotherapy, it may be administered. If the doctor assesses that the tumor is not sensitive to chemotherapy, it should not be forced, and radiation therapy or traditional Chinese medicine treatment may be considered instead. Therefore, the decision should be made based on the specific circumstances.