The little research I've done looks like calcium deposits can happen with wrist arthritis. I've seen something about removing the "pisiform" bone in the wrist, I think if the pain is on the pinky side (ulnar side) of the wrist. Eorthopod states in a study of 21 patients followed up for 3 years, 20 were pain free after the surgery, which left tendons and ligaments around the bone were left untouched, so function was preserved. One patient complained of pain with strenuous activity of the 21 patients followed up.
Thanks for writing to the forum!
It is very difficult to diagnose calcium deposits with naked eye. In all probability you have a ganglion (cyst) or a neurofibroma. Both can cause pain in the wrist joint. A ganglion is a sac-like swelling or cyst formed from lining of a joint or from a tendon. A neurofibroma is a collection of nerve and fibrous tissue. If they are causing pain and pressure symptoms they need to be removed. Please consult your PCP to start with and get a referral for a surgeon.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!