Talk to Neuro - Brain on Posterior Fossa Brain Tumor Medulloblastoma Who Grade 4

my brother was diagnosed with brain tumor at fauji foundation hospital Rawalpindi where he was firstly operated for vp shunting and then month after he had gone through major posterior fossa brain tumor craniotomy , doctors told that 71 tumor is removed and remaining will be removed by radiation treatment but after that round about for month he was in ICU and started recovering very fastly even though he had started eating but suddenly he felt unconscious , doctors told we need to adjust a shunt and again he goes through a minor surgery and they discharged us from hospital but he remained unconscious for 2 weeks showing little movements and now he had just opened the eyes and showing Little response we have to make him conscious so that radiation process will be started because tumor is growing