my husband had proton therapy with his second bout of cancer. 1st one of base of tongue, the second was in the vicinity but inoperable. He did chemo for 5 days, break for 2 weeks, then more chemo. he had a backpack those days. He also had immunotherapy. He has been cancer free for a little over a year now. He had treatment at Mayo in MN. They said they had only lost 1 patient after another hospital kind of sent him home to just slowly pass away.