I have it in both hands (Inherited I presume) and cannot play the flute without problems but can still play the whistle. I had the injection on one hand and surgery on the other.
Both procedures were fairly successful but it is still there and like a weed keeps on growing. The consultant said I can have surgery again which I will put off as long as possible. Luckily in the UK treatment can be got on the National Health.
I think there is plenty of research going on as it's a common problem so hopefully treatment will improve with time.