Thank you all for your feedback.

I'm typing this with a partially-bandaged hand: I did decide to go through with the surgery after getting a second (and third!) opinion. It seems the cysts are not related to Dupuytren's. The post-op is much better than I expected.

Hope you all have a happy and healthy new year.

Thanks -- I had both the cyst on the knuckle and the one below the thumb combined with trigger finger.

And the saga continues:

I went for my first post-op visit today to get the bandages off and start physical therapy. It was the first time I'd seen the doctor since my surgery (I was knocked out). He said that during surgery he saw that the cysts were "Dupuytren-ish" but also cyst like.

So there we go. Back to my initial suspicions.

Again, such a misunderstood disease.