A Rare Case of Prosthetic Lunate Dislocation.

Kienböck disease is an uncommon entity in hand surgery. The current treatments for Kienböck disease consist of revascularization procedures, limited intercarpal fusions, or carpectomies. Historically, a carpectomy with placement of a prosthetic lunate was the procedure of choice. This has fallen out of favor because of complications such as synovitis, infection, and development of pericarpal arthritis. We report a case of prosthetic lunate dislocation in a 70-year-old woman who underwent a lunate replacement due to Kienböck disease over 40 years ago at an outside institution. In recent years, the patient had reported an occasional clicking sensation in her wrist with mild discomfort. Unfortunately, after a round of golf she developed acute wrist pain. Subsequent imaging revealed a volarly dislocated prosthetic lunate. She underwent a subsequent proximal row carpectomy.