I know what you mean, mine is years ago now, but eventually got daughters medical files, I was described as neurotic mum as I sat and read files.
I had gone armed with current Dr's files and cat scans, just in case this is what i found, demanded to see old Dr straight away.
After a short wait, Dr huffing and puffing, and commenting she's wasting my time, I handed him daughters file, with the comment you had better take look at this cat scan, the silence was deafening, you failed to diagnose tumor, loudly so the whole waiting room could hear.
I gave him a lecture, in my best headmistress style, daughter laughs and tells me I am good at it, hopefully he learnt a lesson in listening to his patients.
My daughter had a brain tumor, it had been diagnosed as learning diffuculty, for years previous, until a new Dr asked her to stretch out her arms, close her eyes and touch her nose, she missed her nose, new Dr's face told its own story about what was wrong, CAT scan ordered immediately, and told its own story, they don't know what it is, just to dangerous, but it hasn't grown in years.
Tumor so deep they cannot do anything about it until the odds of it killing her weighted against the surgery killing her, so they have left it alone for now.
She is on the top of the list for sub-cellular laser surgery, when it become safe then they will burn out tumor.