Fifteen brain tumor patients were treated with slow neutron. It proved to extend life span of terminal glioblastoma patients irresponsive to Co-60, to 2 years, but quality of survival is poor due to complications of previous treatments. Two glioblastoma patients excluding other treatments, the only genuine Boron-neutron capture therapy cases, have been living for 39+ and 34+ months working full-scale without neurological deficit.