investigations in proton beam therapy of cancer patients have been initiated at the cyclotron laboratory , harvard university , cambridge , usa , since 1974 using a proton beam with the energy of 160 mev for fractionated irradiation of uveal melanoma ( 899 cases ) , chordoma and chondrosarcoma of the base of the skull ( 96 ) , sarcoma of the soft tissues and bones ( 79 ) , prostatic cancer , head and neck tumors , etc .
C0008487
chordoma
C0262950
bones