I have it too - affecting the little finger of my left hand - it first became apparent 10 years ago with a small lump that I thought was a cyst that could be easily removed - the doctor told me what it was and that I could expect it to affect other fingers and my other hand as well - cheerful man! - fortunately no other fingers show signs of developing contracture but the little finger is now bent right back into the palm - I'm left-handed too - typing is fine - wearing gloves is a hassle - and it's a pain not being able to flatten my palm - but in the scheme of things it's a minor disability and I wouldn't contemplate surgery