Hello,My father is 54 years old and has esophageal cancer. About a year and a half ago he was diagnosed, and he had a large tumor in his esophagus. Before this diagnosis my dad had no previous health problems. The tumor was removed and he went through kemo therapy and radiation. He lost a lot of weight and became very week. About 6 months ago they found a large tumor in his brain, which was removed and he was put back on radiation but not Kemo. He is now off of radiation, and is determined terminal. What is the estimate of how long to live? He seems very weak but as a daughter I want to have a realistic estimate.Thanks,Andrea W