Hi there,
for me it was the other way around - diabetes came as the icing on the cake :wink:
I'd had PsoriasisArtrithis (no signs on the outside though) for a couple of years before I got diabetes. It did get a whole lot more aggressive at about the same time I got D. I've also had some bad thyroid-functioning on and off for about 15 years, never bad enough to need to take drugs for it though.
Endo says it's unrelated but I can't help wondering since they're all auto-immune conditions.