The FDA has approved the immunotherapy Keytruda for solid tumors with a tumor mutation burden of 10 or greater. This means that CRC patients with MSS tumors (with TMB of 10+) are able to get insurance coverage for the use of Keytruda! My oncologist had to petition and appeal to get my insurance to cover Keytruda for me. I have been in it for over 2 years and am a “complete responder.” I am MSS (and all my chemo options were no longer working. I had cancer in lymph nodes near my lungs when I started Keytruda in May 2018). My doctor ordered Foundation One testing and found that I had a TMB of 11....and thought that Keytruda was a final option to try. Today I am cancer free (9 years after initial diagnosis of stage IV colon cancer and lots and lots of chemo and surgeries and rfa’s.
https://www.fda.gov/drugs/drug-approval ... lid-tumors