Charged Particle RT for Chordomas and Chondrosarcomas of the Base of Skull or Cervical Spine

Inclusion Criteria: * Biopsy proven chordoma. Slides must be reviewed prior to randomization by the central review pathologist * Sites: Intercranial (sphenoid, clivus, petrous, basio-occiput) or cervical spine * Boost target volume less than or equal to 150 * 18 years of age or older * Karnofsky Performance Status \> 50 * Neurologic Function of I or II * No evidence of metastases Exclusion Criteria: * Previous radiation to the head or neck that would compromise the ability to deliver the prescribed treatment * Concurrent or prior malignancy unless disease free for 5 or more years * Evidence of metastatic disease * Diabetes mellitus * Major medical illness or psychiatric impairments that in the opinion of the investigator, will prevent administration or completion of the protocol therapy