question: My husband was dx with gastric cancer in Jan.  It had already spread to his liver and nodes and chest and pelvic area.  He has been receiving treatment every 3 weeks and has gotten worse by the day.  He now sleeps 18 to 20 hours a day and is in pain all the time.  I keep asking his MD if we should keep going through with the treatments and he wants to keep going for another month and get another PET scan.  Is there any posibility the tumors are shrinking even though his health continues to go down hill daily