I don't have that but I do have Flexor Teninitis (Trigger finger).
It is not as serious as Dupuytren's contracture but it is becoming a problem.
The pain is getting worse and so is the stiffness. I can't completely straighten out my middle finger of my left hand anymore and I have a Ganglion Cyst at the knuckle on the palm side. It gets stuck when I am playing guitar and I can't get to the next chord.
I have had the steroid injection. It helped for a few months but now it is back. It is starting to interfere with my chording on the guitar now. But that might not be such a bad thing. It gives me a good excuse for playing badly. smile

Surgery is indicated now. I just need to get it done before the finger develops a permanent bend.

Good luck with your surgery John. I'm sure you will do fine.

Bill
http://www.soundclick.com/billrobinson
http://www.dreamqueststudio.com
Skype; bill.robinson12

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