There's been great news!   Sam had a PET scan two weeks ago and it came back with NO ACTIVE CANCER cells!  He will only have to have 1 more round of chemotherapy to complete his treatment.  His blood cell counts were evaluated (last week and again this week) and both weeks' tests results showed that his counts were too low (neutropenia) to continue treatment.  He will be evaluated again on Monday to determine if his counts are high enough (meaning his risk of infection is lowered) to begin his last week of chemotherapy!  Minor setback but thoughts and prayers for an increase in his counts.