Thank you.. I learned something new today. I recently completed a 14 day cycle of radiation for a small spot on my other/good lung. Upon inquiring when I could get a PET scan to see if it worked, I was told not for 4 months because the radiation continues to work for that long after the last treatment. Good news is I go back on the Keytruda 200mg every 3 weeks starting Feb 1. Question. Has anyone had an issue with fluid on the lungs and what was done?? I’m having a problem, getting drained every 3rd day, and can’t seem to get my questions answered. Never give up.