Good Day, My Father In Law Is Having Terminal Esophagal

Good day, my father in law is having terminal esophagal cancer, and doctors say the cells have spread to al his vital organ;presently the mass on the left side of his throat suffoquâtes hims time and again, he has difficulties breathing normally and is very tired, and has serious cough.What can we do to relief him of the turmour blockage on his throat.Thank you