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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.
Acute trauma or repetitive use over time can lead to tears in the cartilage and/or ligaments. The most common cause of injury to the cartilage and ligaments of the wrist is a hard fall on an outstretched arm with the palm side down or from excessive torque at the wrist. If the ulnar side of the wrist is hyperextended the TFCC could tear or rupture.