When I was 4 - 5 years old (back in the 1950's), I had terrible problems with ear infections, ear aches, etc. Today, they put "tubes" in kids' ears for that. They didn't have that back then. They would lance my ear drums to let the fluid drain. Of course, it would heal up and they'd have to do it all over again.
I had each of my ears "lanced" 26 times. Finally, the doctors told my parents they wanted to do a new, experimental treatment on my ears. That treatment was "x-ray therapy." My folks agreed. I don't know what they did or how they did it, but it worked. When I was younger and learned about the dangers of x-rays, I worried that I'd have brain cancer or other type of cancer as a result of that treatment.
But now I'm in my 60's. If I'm lucky, I'll avoid brain cancer long enough to die of something else first.