My 74 year old brother is recovering from a liver abscess. It was drained 2 weeks ago. The doctor did a colonoscopy and says he has two masses in colon on opposite ends. He tells the family that he is 99% certain that it is cancer but has done no biopsy. My brother says that food does not taste good and refuses to eat. He has lost 40 lbs (190 down to 150). Doctors say no treatment can be administered until he eats and grows stronger and has told wife to keep him comfortable until the end. Should she seek additional diagnosis from specialists? What about a biopsy?