Proton Radiation for Chordomas and Chondrosarcomas

Inclusion Criteria: * Histologically confirmed diagnosis of chordoma or chondrosarcoma. * Patients must have no evidence of metastatic disease based on routine imaging (CT or MRI of the chest/abdomen/pelvis, bone scan, etc.) * Patients must have an ECOG score equal to or less than 2. * Age ≥ 18 years. * Patients must be able to provide informed consent. * Adequate bone marrow function: WBC ≥ 4000/mm3, platelets ≥ 100, 000mm3 * Women of child-bearing potential as long as she agrees to use a recognized method of birth control (e.g. oral contraceptive , IUD, condoms or other barrier methods etc.) Hysterectomy or menopause must be clinically documented. * Tumors arising in the skull and spine. Exclusion Criteria: * Prior or simultaneous malignancies within the past two years (other than cutaneous squamous or basal cell carcinoma, melanoma in situ or thyroid carcinoma) * Patients with the following histologies are excluded: melanoma , other soft tissue or bony sarcomas, giant cell tumor aneurismal bone cyst or metastatic lesions from other histologies. * Pregnant women. * Actively being treated on any other therapeutic research study. * Tumors arising outside of the CNS.