Proton therapy: a different beam, and how people get to one

Protons are not a stronger kind of radiation. They stop at the tumor instead of carrying on through. That spares the tissue behind it. Whether that helps you depends on your tumor. And the harder question is usually how far away the nearest center is, and what your insurance says.

The short version

Proton therapy is radiation given with a different kind of particle. A proton beam stops at the tumor instead of carrying on through, so less of it reaches the tissue behind. That is the whole of the difference. Protons are not stronger and they are not aimed at a different goal. Being in the room is much the same as ordinary radiation. The hard part is usually not the treatment. It is how far away the nearest center is, and what the insurance says.

What is proton therapy?

It is radiation therapy given with protons instead of x-rays.

Most radiation for a brain tumor uses x-ray beams, which are also called photon beams. A photon beam travels through your head. It gives its energy on the way in, at the tumor, and on the way out the other side.

A proton is a much heavier particle than an x-ray is made of. A proton beam gives up most of its energy at a set depth and then stops. Your team chooses that depth. So the tissue behind the tumor gets very little.

That is the reason anyone would use it. It is not a stronger beam and it is not a different treatment. It is the same job, with less of the beam landing on parts of the brain nobody wanted to treat.

The machines have different names too. Ordinary radiation comes from a linear acceleratorlinear accelerator: The machine that gives external radiation. It moves around you and aims the beam. Like an x-ray, the radiation from it is painless. See the glossary. Protons come from a machine called a cyclotron or a synchrotron. Those machines are large and they cost a great deal, which is most of why there are so few of them.

Would it be better for me?

The honest answer is that it depends on your tumor, and for many brain tumors nobody knows yet.

Where the case is strongest. Protons suit a tumor with a clear edge, sitting next to something you cannot afford to damage. The American Cancer Society names chordoma as that kind of tumor, and says protons may help more when a tumor is near vital structures. The American Cancer Society also lists certain childhood cancers among the ones it is used for.

Where it is not settled. The same page says it is not clear whether protons are as useful for tumors that grow into the brain around them. It names the astrocytoma and the glioblastomaglioblastoma: A glioma that is given grade 4. Grade 4 is the highest grade there is. The tumor grows fast. Treatment usually starts soon after it is found. It often means surgery, and then radiation and chemotherapy. See the glossary. Those are most of the tumors this site is about. European guidelines say much the same thing. Protons are worth thinking about when a tumor sits close to a part of the brain at risk. But trials are still needed before anyone can say how they compare.

So the word to be careful with is "better". Protons are better at missing things. Whether missing those things leaves you better off, years later, has not been settled for most brain tumors. A center that offers it should be able to say what they expect it to spare in your case.

That is a fair thing to ask straight out. Ask your radiation oncologistradiation oncologist: The doctor in charge of radiation treatment. They decide which area is treated, and how the treatment is split up. See the glossary whether proton therapy is an option for you, and why or why not. A no with a reason is useful. A no you never asked for is not.

What happens, step by step

The same steps as ordinary radiation to the head, with two differences.

1. You meet the radiation oncologist and go through your scans.
2. You have a planning scan, a CT or an MRI, lying in the position you will be treated in. A mask is made to hold your head still.
3. The team builds your plan and checks it. That is a gap of a few days with nothing happening, and it worries people.
4. You come in on weekdays for several weeks. Pictures are taken each time to check your position, then the beam is given.
5. Someone from the team goes through how you are doing as the weeks pass.

Radiation therapy: the mask, the daily visits, and what comes after walks through every one of those steps in detail, including the planning visit and the mask. Everything about the weeks of treatment is the same.

The first difference is the room. The machine is a different one, and it is much bigger. Depending on where your tumor is you may sit in a chair rather than lie on a table.

The second is the paperwork, and it happens before any of the rest. Your plan usually has to be approved by your insurance first. That is the part of this treatment with its own section further down.

How long does it take?

About the same as ordinary radiation, once it starts.

• Each visit: usually about a quarter of an hour to half an hour. Most of that is getting you into exactly the right position.
• The whole course: weekdays, over several weeks. How many weeks depends on what is being treated.
• Before any of it: the planning scan, then a few days while the plan is built, then however long the insurance decision takes. Ask for that last one as a separate answer. It is the one nobody quotes you.

Is it the same to be in?

Yes, near enough.

The beam itself does not hurt. You do not see it or feel it. You lie or sit still, you are alone in the room while it runs, and somebody is watching and listening the whole time.

Tiredness turns up during the weeks and can carry on afterward, the same as with ordinary radiation. The skin in the treated area can go red, dry, itchy or sore, and hair goes where the beam goes.

The rest of what a course of radiation is like, week by week, is on the radiation therapy page. It is written for x-ray beams, and the weeks are the same here. What should make you call your team the same day, and what is an ambulance, is on that page too.

What protons are trying to buy you is fewer late effects, not an easier six weeks. That is worth knowing before you rearrange your life for it.

Where are the centers, and what would getting there mean?

This is the part that decides it, and it is rarely the part anybody is told about early.

There are not many of them. The American Cancer Society says there are a limited number of proton centers in the United States, and that more are being built. No number is printed here, because the ones in circulation come from directories rather than from a study, and they go out of date. Ask your team where the nearest one is. That is the answer you actually need.

So people travel, and the travel is not small. One large cancer center compared everybody it treated with radiation over six years. The people who had proton therapy had come, on average, from well over twice as far away as the people who had ordinary radiation.

That turns into weeks away from home, because the treatment runs on weekdays. Work the real cost out loud, with somebody, before you decide:

• Somewhere to stay for several weeks, near the center.
• Time off work, for you and possibly for the person going with you.
• Who is looking after children, or a parent, or a dog.
• Getting to the center every weekday once you are there.

None of that is a reason to rule it out by yourself. Ask the center what they have. Lodging schemes, discounted rates with nearby hotels and a social worker whose job is exactly this are all things centers can have. Ask before you decide it is impossible, because it is the kind of help that is not advertised.

And ask even if nobody has offered. Studies have looked at who ends up getting proton therapy. The tumor is not the only thing that decides it. In that same center's figures, people living farther away were more likely to get it, not less. That sounds backwards next to the paragraph above, and it is the point: what stops people is not being sent, rather than the distance itself. The same studies keep finding that Black patients are less likely to receive it than white patients with similar cancers. So ask directly. Do not wait to be offered.

What if my insurance says no?

A no is not a verdict on your case, and it is not the end of the road. There is a route out of it, it is written into law, and this section is what it looks like.

Proton therapy costs more than ordinary radiation. That is why plans look at it harder. One review found that radiation oncology has the heaviest approval burden of any medical specialty, and that proton plans are among the most likely of all to be flagged.

There are two rounds, and the second one is not your insurer. First you appeal to the plan itself. If the plan says no again, the law gives you an outside review by an independent organization. In some plans that is federal law and in others it is your state's, and your center will know which. Those reviewers work for neither your hospital nor your plan, and their decision is binding on the plan. The review costs you nothing. The plan pays for it.

The outside review is worth using, and it often is not used. The researchers who studied it say centers skip it, and give four reasons: nobody there knows the route, nobody knows the law, there is no process for it, or there is nobody to do the paperwork. In their study of the published records from three states, California, New York and Washington, a little over four in every ten proton requests were decided in the patient's favor. Brain and spinal cord tumors in that set came out about the same. That is one study of three states and it is not a forecast about your plan. It is a reason not to stop at the first letter.

Four things make an appeal stronger, from the same study:

• It points to the published guidelines for your tumor.
• It names the studies behind the request.
• It says whether you would be eligible for a trial.
• It includes a letter about you, not a form letter.

Your center writes these. Ask who does it there, and ask to read what they send.

Ask for it to be treated as urgent. Plans have to answer an urgent request far faster than a routine one, and the researchers say cancer cases are exactly the ones that should be marked that way. In their figures the difference was the best part of a month. Ask whether yours can be marked urgent, and ask at the first appointment rather than after a refusal.

And ask the question that matters more than any of this: would waiting hold up my treatment? Sometimes the answer is no, and your radiation oncologist will say there is room to argue. Sometimes it is yes, and starting ordinary radiation on schedule is the better plan. Your radiation oncologist can tell you which, and it is the one question on this page you should not leave the room without.

If you are on Medicare, the picture is different. Medicare does not require this kind of approval before radiation. Medicare Advantage plans are run by insurers and often do. Check which one you have, because people use the word Medicare for both.

What you need first

Before a proton center can start, expect:

• The same scans as for ordinary radiation. An MRI with dye, and a planning CT in your mask. Your MRI scan and your CT scan cover those appointments.
• Your pathology and gene results, because they are part of what the plan is argued from. The words on your gene results takes them one at a time.
• The insurance paperwork itself, which is the slowest part. Ask who at the center handles it and how you will hear.
• A plan for where you would stay, if the center is far away. Ask about that at the first appointment, not after approval comes through.

Everything else on what to bring and arrange before radiation starts applies here too, including the dental work, the beard and the questions about having children.

For the person going with them

If you are the one driving to the appointments, keeping track of the pills, and lying awake at night worrying about them, this part is for you.

You are allowed to ask questions. In one study, families said they were afraid of annoying the doctor by asking too much. One of them was told by a doctor to stop playing doctor. Ask anyway. Write your questions down before you go, and bring a notepad. Two people in the room hear more than one.

Ask who your first call is. Care comes from a lot of people at once, and it is easy to end up as the only one holding it together. Ask the team: who do I call first? Some teams have one person whose job this is, often a nurse. Get the name and the number.

Get two numbers, and know which one to use. One for work hours, one for nights and weekends. Then ask what counts as "call us today" and what counts as "call an ambulance" for this tumor, and write the answer down where you can see it. If you are not sure which it is, call. Nobody on that team will mind.

If they have seizures, read about them before you need to. What to do when someone has a seizure is the one to know by heart. Living with seizures is about the rest of the time: what is safe, what to change, and driving.

Ask to be shown anything you are sent home to do. In that same study, families were sent home to change dressings and give medicines with no training at all. That is not fair to you. Before you leave the hospital, ask someone to show you. Then do it once while they watch.

Say what you notice. You may see a change before they do. Changes in thinking, mood and behavior can show up to the people close by first. Telling the team is not going behind their back. It is something the team cannot learn any other way.

Look after yourself, and let people help. Eat, sleep, and keep your own appointments. Take a little of the day back for yourself. When someone asks what they can do, give them a real job: a meal, a ride, an hour with the kids. Most people want to help and do not know how to offer.

You can talk to somebody about all of this today. See where to get help.

Proton therapy asks something of you that ordinary radiation usually does not, and it is worth saying out loud early.

This one may take them away from home. If the center is not local, somebody is living somewhere else for several weeks. Decide together, early, whether that is you, or someone else, or in shifts. Trying to work it out in the first week is how people end up doing it alone.

Take the paperwork off them if you can. There is a lot of it, and it arrives in the same weeks as the diagnosis. Ask the center who handles the insurance side and get that person's name. Ask to be copied in. Keep every letter, including the refusals, because an appeal is built out of them.

Do not let a refusal letter be the last word in the house. It reads like a verdict and it is not one. There is an appeal, and then an outside review by people who work for neither side. The section above says what makes one stronger. Ask the center's team whether they are doing it.

Ask about help with the costs of being there, not just the treatment. Lodging schemes and travel help exist at many centers and are rarely offered without being asked for. It is a good job for the person who is not the patient.

The rest of it is the same as any course of radiation. The driving, the tiredness that builds and does not stop on the last day, the skin rules. The radiation therapy page has all of that, and every word of it is true here.

Who decides, and how will I hear?

There are two decisions, and they are made by different people.

Whether protons would suit your tumor is your radiation oncologist's call, usually with the rest of your team. That conversation can happen at your first radiation appointment, and you can start it.

Whether it gets paid for is your insurer's, and then, if they refuse, an outside reviewer's. You are not in that room either time.

Ask how you will be told, and when. Ask whether somebody calls you or whether it appears in your records first. And ask what happens to your start date while the answer is being waited for. All three have answers, and none of them is a difficult question to ask.

What to ask your team

• Is proton therapy an option for me, and why or why not?
• What would it spare, in my case, that ordinary radiation would not?
• Is it known to be better for my kind of tumor, or is that still being worked out?
• Where is the nearest center, and would you refer me?
• How long would I be away from home, and does the center help with somewhere to stay?
• Who handles the insurance request, and can I see what you send?
• Will you have to build an ordinary radiation plan alongside it to compare, and does that add time?
• Can the request be marked urgent?
• If it is refused, will you take it to an outside review?
• Would waiting for a decision hold up the start of my treatment?
• If it is refused in the end, what is the plan instead, and is it a good one?

Where to go next

• Radiation therapy: the mask, the daily visits, and what comes after for the appointment, the mask, the weeks and the side effects. The weeks of treatment are the same.
• Stereotactic radiosurgery: it is not surgery if that name has come up at the same appointment.
• Your MRI scan for the scan the plan is built from.
• Clinical trials: is this for me? because trial eligibility is one of the things an appeal can rest on.
• Get help now if you need to talk to a person today.