Hi, I m very sorry to hear about your uncle. The injuries which you have described are very serious. Ill explain them here so you can better understand what this all means. The first thing is that diffuse cerebral edema which means his brain is swollen, Mild subrachnoid hemorrhage means that he has bled into the space between the thin covers of the brain (there are three coverings in the brain, called meninges). Mild tentorial and interhemispheric hemorrhage with hemorrhage in atrium of both lateral ventricles means that he has also bled into the Ventricles which are fluid containing sacs in the brain. soft tissue hematoma in prefrontal, preseptal and infraorbital regions means that he has collections of blood in the skin and fat of the head. Now as far as his survival chances are concerned, this is a difficult question because the survival is not only based on his CT scan findings but rather on his clinical condition. Usually with these sort of injuries a number of factors play into the recovery, his conscious status, his blood pressure readings, his requirement for sedation etc etc. However generally speaking about 20 - 30% of patients with these type of injuries can recover and come out of the coma, that being said i cant say for sure what will be his functional status once he comes out of the coma. As far as the time it will take, that is entirely based on a case to case basis. I have had patients with similar injuries waking up anywhere between 4 weeks to 4 months. You cannot put a specific time on when he should be waking up as the time line differs for every patient. The best person who can answer both of these questions is the treating physician, as he has examined the patient and knows his clinical condition and can factor in all the various problems which might be ongoing. But as i said generally speaking up to 30% of these patients can recover.