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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.
Displaced fractures of the base are usually associated with TFC tears and can be associated with instability of the distal radioulnar joint (DRUJ). On the left a subtle fracture of the tip of the ulnar styloid process (blue arrow) in a patient with a volar Barton's fracture. Notice the depression of the volar rim.