I have studied your case with diligence
report suggest ulnar styloid fracture
which is not united and along with it there is degeneration of joint.
If there is pain at fracture site then surgery is required.
You may need to take decision early to avoid further stiffness
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.