Why would you want to inject anything into a BENIGN tumor?  Notorius Dr. Tulio Simoncini repeatedly injected baking soda into a woman's breast cancer in a Denmark clinic.  She died of acute alkalinosis.

If you want to get rid of a benign tumor, try taking lots of digestive enzyymes several times a day on an empty stomach and/or take inositol/IP6.  Be sure the digestive enzymes contain several different enzymes (lipase, amylase, chymotripsin, serrapeptase, etc.).  You might have to supplement separately with serrapeptase, as it is not normally found in combo enzyme products.