I read your question and I am sorry about your husband s illness. ADEM is a disease which affects mainly children. Adults comprise only about 3% of the cases (perhaps because some cases are difficult to separate from multiple sclerosis). Usually ADEM responds well to corticosteroid treatment, but about 5% of patients do experience relapses when weaned of the prednisone treatment and also there is a risk of developing multiple sclerosis in the future. However, since as I said adult cases are rare, these figures I just gave must be taken cautiously, because they are numbers taken from studies where most patients were children, I am not aware of any figures specifically for the adult ADEM patients population. Hope things work out for the best, feel free to come back to ask further questions.