Total Distal Radioulnar Joint Arthroplasty for Paget's Disease of Bone.

 Distal radioulnar joint (DRUJ) and ulnocarpal pathology, such as ulnocarpal impaction, are relatively common causes of ulnar-sided wrist pain. We herein report a rare case of ulnocarpal impaction and DRUJ arthropathy due to Paget's disease of bone (PDB) in the ulna.  A 65-year-old, right-hand-dominant male was diagnosed with right-sided ulnocarpal impaction secondary to PDB.