Yup. I'm a U.S. expat who moved to an EU country. Though the healthcare is really good here, I'm always a little taken aback by the different policies, procedures, and mannerisms. It feels quite different than in the U.S..
I had to have a routine gynecological operation awhile back. It was supposed to be simple procedure to correct certain symptoms. However, when the doctor came to debrief me after the surgery, she proceeded to tell me that I had this one, really rare condition — which would likely threaten my fertility and increase my cancer risk (my mother had ovarian cancer, which I'm terrified of.) She also said I would have to take medication for the rest of my life. I have health anxiety and want kids, so I was freaking out about it. When I went to the follow-up appointment a few weeks later, the doctor looked at my chart and didn't mention any of this until I asked her about it specifically. Then she just said, "What? Did I tell you had that? I was wrong. You're fine, and the problem is fixed. Sorry for worrying you." I was just like wtf?
The point is, in the U.S., I really doubt a surgeon would have told me I had a rare condition like that without a proper workup. (It's definitively diagnosable with a blood test, but the doctor didn't do one. She only diagnosed it via surgical camera.) And I especially doubt a surgeon would have told me this while I was still groggy from anaesthesia when no one else was with me. But, here, they shrugged as if that mistake were nothing. This wasn't the first strange medical experience I've had, but it was the most dramatic. So, based on my experience with this (IMO) unprofessional doctor, I see OP's story as real.