the same thing happened to a friend of mine last year, she was diagnosed with cervical cancer about three years ago but was messed around for ages beforehand being told she was fine. She also died last year, she'd been given the all clear only to be then told a few months later it was actually terminal when she complained of further pains.
It makes me wonder if they have the faintest idea what they're doing at all. Another reason not to blindly trust the state and it's supposed 'expert' agents, not that I'm trying to discuss that again in here Angus