Yes My Husband Had APL Lukemia Last Year He Was

yes My husband had APL Lukemia last year he was in bed over 50 days nad is in remission however, he cannot walk without a walker. He has no balance at all! If he lets go of the walker he falls. and even falls when trying to go on the toilet. He has had 3 months of PT and they released him saying they could not help him. Will he ever regain his balance? He has a terrible time getting in & out of a car & has to have arms on a chair to get out of it. What or where can he go to get his balance back? He seems pretty healthy now except for the balance walking?