May 2014 my dad quit chemo. January 2015 he went to see the doctor get a CT scan the CT scan. They found 1 module in his lung. So they wanted him to come back in 3 months. April he went back and it was gone. July he went back again the n odule is back and grew just a bit and 8 more nodules were there. October he went back again 4 nodules grew again the othe were the same and they cannot do biopsy cuz they r to small. Should I be worried.