Hi, there. Cerebral atrophy is a condition resulted from various serious brain diseases. Some of them are: trauma, epilepsy, Alzheimer's disease, leukodystrophies, infections, MS, stroke, etc. I suppose your relative has developed an epilepsy after that trauma. Since these are all serious conditions, outcome is also serious. Treatment is mostly symptomatic and supportive. If the cerebral atrophy is progressive, it is fatal since it spreads on whole brain. If it is focused on one part of the brain, it can interfere with normal functioning. But, it doesn't have to be fatal in that case. Prognosis also depends on duration of this condition, possible complications, etc. It will be best to speak with the doctor.
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