Causes of death after the first sessions of irradiation of the brain in metastatic involvement

: Of 240 patients irradiated for metastatic brain tumors 4 died 4.5-60 h after the first session of irradiation at doses of 1.7-6 Gy. A clinicomorphological analysis showed that the main cause of death was acute microcirculatory disturbance in cerebral tissues with the formation of new hemorrhagic microfoci associated with severe disorders of cerebral tissues as a result of their involvement by far-advanced tumors.