title: A phase I study of mixed (neutron and photon) irradiation using two fractions per day in the treatment of high-grade astrocytomas.
abstract: A Phase I study of the treatment of 50 patients with high-grade astrocytomas by mixed schedule (neutron and photon) irradiation given in 12 fractions over 4 weeks is reported. The neutron and photon fractions were separated each day by 2-3 h. A total neutron dose of 6.36 Gy (8% gamma) and 20.40 Gy of photons was prescribed. Treatment was well tolerated and there was no clinical evidence of radiation-related morbidity in the brain. The median survival was 6.9 months, similar to that expected after photon irradiation alone. A multivariate analysis of prognostic variables in presented.
mesh_terms: D001932:Brain Neoplasms / Q000401:mortality / Q000532:radiotherapy*; D005214:Fast Neutrons / Q000627:therapeutic use; D005909:Glioblastoma / Q000401:mortality / Q000532:radiotherapy*; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011379:Prognosis