Having the name, I went out and looked at some info on Dupuytren's. Apparently in some cases it is associated with but not necessarily -caused- by a generally over-active auto-immune system. Err, at least that was what I understood.
Anyway, I may indeed go and see someone more than my GP who shrugged and said oh, that, can't do anything.

I had a crush on G&S when I was a teen....

Buttercup. Beautiful glossy yellow flowers, cheerful, tough, kind of prickly stem. I thought it was an apt description. :)

Garden = yes.
Mine: http://ranunculus.dreamwidth.org/363113.html