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A TFCC tear is an injury to the triangular fibrocartilage complex, found in the wrist, between the end of the ulna bone and the carpals. Its function is to stabilize the radioulnar joint.
The most commonly associated injury is to the ulnar styloid process. Styloid fractures can occur either to the very tip of the styloid or at the base. Because the triangular fibrocartilage (TFCC) attaches to the base of the ulna styloid, displaced fractures can result in instability of the distal radio-ulnar joint.