hello doctor,my uncle 62 years now ,diagnosed as a 4 stage lungscancer its spread in liver , tracea.before 5 months he had an operation for his eye .and removed right one but we don t what is the original problem now the doctors find out this last stage .now when he is talking no sound,before eye operation this sound problem there.then doctor told because of allergy sound problem.now what is the treatment and how long he can live