TFCCskade

TFCCskade, or TFCC injury, refers to damage to the triangular fibrocartilage complex (TFCC) of the wrist. The TFCC is a key stabilizing and load-distributing structure on the ulnar side of the wrist, helping to stabilize the distal radioulnar joint and to support the ulnocarpal joint during grip and rotation. The complex includes the triangular fibrocartilage disc, the radioulnar ligaments (dorsal and volar), the meniscal homologue, and other soft tissue elements.

Causes and mechanism of injury often involve a forceful fall on an outstretched hand, forearm rotation, or repetitive axial loading, particularly in athletes and manual workers. Tears can be central (often less well vascularized) or peripheral (more vascularized and more likely to heal with treatment). Ulnar variance and degenerative changes can contribute to chronic TFCC pathology.

Clinical features typically include ulnar-sided wrist pain that worsens with forearm rotation and gripping, tenderness over the TFCC area, swelling, clicking or instability, and reduced grip strength. The presentation can be subtle in chronic cases.

Diagnosis is based on history and exam findings, including tests such as the piano key sign, fovea sign, and TFCC loading test. Imaging starts with X-rays to exclude fractures; MRI or MR arthrography provides detailed visualization of the TFCC. Diagnostic wrist arthroscopy is considered when the diagnosis remains uncertain.

Treatment is generally stepwise. Nonoperative management includes activity modification, immobilization in a cast or splint for several weeks, NSAIDs, and targeted rehabilitation. Corticosteroid injections may be considered in select cases. If symptoms persist, surgical options include arthroscopic debridement or repair of peripheral tears, central tears may be debrided if repair is not feasible, and ulna shortening may be performed in cases of positive ulnar variance. Prognosis is better for peripheral tears and patients who receive timely treatment; central tears often have a more guarded outcome.

Prevention focuses on proper technique and conditioning, especially in sports and occupations requiring repetitive wrist loading.