As far as I know, Keytruda is an immunotherapy drug. That would explain why he doesn’t show a lot of side effects like when he was on chemo last. The drug works by getting the body’s own immunity system to recognize the cancer and destroy it. If the cancer is shrinking, maybe he’s responding to the treatment.


Gloria
She stood in the storm, and when the wind did not blow her way, she adjusted her sails... Elizabeth Edwards

Wife to John,dx 10/2012, BOT, HPV+, T3N2MO, RAD 70 gy,Cisplatinx2 , PEG in Dec 6, 2012, dx dvt in both legs after second chemo session, Apr 03/13 NED, July 2013 met to lungs, Phase 1 immunotherapy trial Jan 18/14 to July/14. Taxol/carboplatin July/14. Esophagus re-opened Oct 14. PEG out April 8, 2015. Phase 2 trial of Selinexor April to July 2015. At peace Jan 15, 2016.