I am not a doctor but I would like to suggest you research the latest information about Proton Therapy. So far, we are pleased with the outcome after 6 week proton radiation treatment in 2013. Last MRI showed tumor is now reduced about 50% in size (see profile description of KeepSmiling).
Condition of patient: Tinnitus was a complaint in 2009 and reduced hearing in the AN ear. Doctor failed to order MRI but instead focused on a CPAP sleep study. Patient successfully uses CPA machine for sleep apnea. In Nov 2012 there was complete deafness in the AN ear. To reiterate- complete deafness in AN ear prior to the Proton therapy treatment. At certain times there is still some tinnitus. The use of a special hearing aid that picks up sound from your deaf side and transmits it to the better ear has been helpful. Patient has full time scientific career with increasing responsibilities and worked steadily during 6 week fractionated Proton radiation treatment at Massachusetts General Hospital. Is and was physically active with no balance issues and no facial control issues, before, during, or after treatment. Hearing in good ear is sensitive and wearing earplugs when in a loud environment has helped.
The following is what seems to be a good "watered down" explanation of Proton therapy:
Radiation treatments damage the DNA of cancerous cells to destroy tumors.
The difference between traditional radiation and proton therapy is in how the radiation is delivered.
Traditional therapy irradiates tumors with X-ray waves, which are beams of photons, and all tissue along the beams’ paths get a similar dose of radiation.
Proton therapy uses beams of protons, charged subatomic particles that can be controlled with magnets. A small amount of radiation is deposited on the way into the body, most goes directly into the tumor and none passes through the other side.
That means, for instance, that radiation aimed at a tumor in one side of the brain wouldn’t harm the healthy side. And a beam aimed at a spinal tumor wouldn’t reach the heart or lungs behind it.
You may want to research this and it may be helpful. Be careful and be thorough as you get involved in your research. Consider the experience and educational background of the team of doctors and those physicists who maintain the equipment. The dosage also matters. Some proton treatment centers have more experience with head and neck . Some proton therapy centers will soon be upgrading to the newest technology. There have been advances in the technology since 2013.Ask questions about range of uncertainty.
A possible starting point for research:
Really hoping you can find a solution to this tumor regrowth problem. Wishing you well!