[The styloid bone and carpal protuberance].
Dorsal carpal protuberance of the wrist is frequently caused by the presence of a styloideum bone. We report a case illustrating this pathophysiological hypothesis. This pathology is often confused with synovial cyst emphasizing the importance of a lateral view of the hand in 30 degrees supination. Computed tomography sections are also helpful showing the exact nature of the protuberance. A cuneiform resections of the joint line can leave to complete symptom relief.