It's best not to stop, but sometimes it is necessary. My last treatment I had a five day break, due to hurricane Sandy shutting down the hospital. Two days were made up by going for a 6th day. I missed two treatments due to being hospitalized for a blood transfusion. These, and the rest of thd missed days were added at the end, which your RO may do the same. Interrupting treatment gives cancer cells a chance to regenerate. They could put a nasal tube in instead, if for a short duration like 6 weeks, which may involve no days lost. I read of radiation stoppage to be the equivalent of a 1 percent reduction of overall survival, but your doctor may be saying this for good reasons. Good luck with everything.