My husband was told that yes the Parkinson’s doesn’t know what to do when the cancer came into place and goes wild. He had to go to his neurologist to see if the Parkinson’s symptoms where if fact chronic graph vs host disease for his bone marrow cancer or his Parkinson’s advancing. Lucky for him I guess it was his Parkinson’s and not graph vs host disease. He didn’t have a real problem with the chemo and Parkinson’s though. Yet the first round of chemo sent him to the hospital deathly sick. Yes not to many times do they see people with both Parkinson’s and cancer. Doesn’t seem fair does it. Prayers to you. Talk with your neurologist and see if they can’t help control your Parkinson’s during the chemo process. We are in remission now and 1 year out from our bone marrow transplant and just increased his Parkinson’s meds.