My brother has been operated upon for a tumor on the right frontal lobe of the brain. The tumour has been classified as GradeIII glioblastoma. The tumour has been removed totally but with some cells might be there. IMRT with oral Chemo is going on from the last one week on regular basis. He looks fit and fine and with all the vital functioning normally. My question is when the side effect will be evident? He is 53 years of age and his physical condition is fit and fine and he has got no blood pressure or Diabetes. Is it correct that ins some case side effects are not evident? Will he be able to come out of this treatment.