Glad you weren't slack about it. I see the Dermatologist every year and I urge everyone else to do the same.
Every body needs an annual service. Check the bloods, urine and turds. Plus the eyes and skin. Shocked by some people who never bother.
It had actually been a couple of years, the last skin check was at the GP when I was getting the whooping cough injection for original kid - that was 4 plus years ago.
I didn't think anything about going now, uni had finished and it was just something I had to book in to do.
There were no other signs or indications that anything was that far wrong.
I have definitely dodged a bullet here and as the wise one above me says, do it, no matter how old you are.