I am also getting the same shot every 28 days. My tumor was in my pancreas and was removed along with the body and tail of my pancreas along with the spleen. It has now shown up in my liver. At this point I have only had two injections, next one is 4/7. I'm going to MD Anderson on the 14th for second opinion and will have a follow up scan in June to re-evaluate the tumors in my liver. Wish you the best, may God be with us.