TFCC Injury: Triangular Fibrocartilage Complex
A common cause of ulnar-sided wrist pain. Complete guide to understanding the anatomy, diagnosis, and treatment options for TFCC tears.
Understanding the TFCC
The Triangular Fibrocartilage Complex (TFCC) is a load-bearing structure on the ulnar (little finger) side of the wrist. It acts as a cushion between the ulna and carpal bones and is critical for stabilizing the distal radioulnar joint (DRUJ) during forearm rotation.
Anatomy: The TFCC consists of:
- Triangular fibrocartilage disc (articular disc)
- Dorsal and volar radioulnar ligaments
- Ulnocarpal ligaments (ulnolunate, ulnotriquetral)
- Extensor carpi ulnaris subsheath
- Meniscus homologue
Blood Supply: The central portion is avascular (like knee meniscus), while the peripheral portion has good blood supply. This determines healing potential - peripheral tears can heal, central tears cannot.
Palmer Classification
1A: Central perforation (most common)
1B: Ulnar avulsion with/without styloid fracture
1C: Distal avulsion (ulnocarpal ligaments)
1D: Radial avulsion with/without sigmoid notch fracture
1B is most amenable to repair due to peripheral blood supply
2A: TFCC wear
2B: TFCC wear + lunate/ulnar chondromalacia
2C: TFCC perforation + chondromalacia
2D: Above + lunotriquetral ligament perforation
2E: Above + ulnocarpal arthritis
Often associated with positive ulnar variance
Signs & Symptoms
• Ulnar-sided wrist pain: Localized to the pinky side of the wrist
• Pain with rotation: Especially forceful grip with forearm rotation
• Clicking/clunking: With wrist movement
• Weakness: Reduced grip strength
• Swelling: May be present over ulnar wrist
• DRUJ instability: Sensation of wrist "giving way"
Activities that worsen symptoms: Turning doorknobs, using screwdriver, wringing cloths, push-ups, racquet sports, golf swing impact, lifting heavy objects.
Diagnosis
Clinical Examination:
- Fovea sign: Tenderness in the soft spot between ulnar styloid and pisiform (most sensitive test)
- Press test: Pain when pushing up from a chair with wrists extended
- DRUJ stress test: Piano key sign - increased translation of ulna relative to radius
- Ulnar grind test: Pain with axial load and ulnar deviation
Imaging:
- X-rays: Assess ulnar variance (should be neutral or slightly negative). PA view in neutral rotation with shoulder at 90°.
- MRI: Can visualize TFCC tears, but standard MRI misses some tears.
- MRI Arthrogram: Gold standard. Dye injected into joint improves sensitivity to 90%+.
- Wrist Arthroscopy: Definitive diagnostic and therapeutic tool.
Treatment Options
Many TFCC injuries, especially acute peripheral tears, respond to non-surgical treatment:
- Immobilization: Long arm cast or splint for 4-6 weeks (includes forearm rotation)
- Activity modification: Avoid rotation under load
- NSAIDs: For pain and inflammation
- Steroid injection: Can provide relief and help confirm diagnosis
- Physical therapy: Once acute phase resolved, strengthening and proprioception
Trial of 3-6 months conservative treatment before surgery unless DRUJ grossly unstable.
Indications:
- Failed conservative treatment (3-6 months)
- DRUJ instability
- Complete peripheral tears in young, active patients
Surgical Options:
Arthroscopic Debridement: For central tears (Class 1A, degenerative). Remove unstable tissue. Quick recovery.
Arthroscopic Repair: For peripheral tears (Class 1B). Sutures reattach TFCC to capsule/fovea. Longer recovery but restores stability.
Ulnar Shortening Osteotomy: For patients with positive ulnar variance. Reduces ulnocarpal impaction. Combined with debridement or repair.
Wafer Procedure: Arthroscopic resection of distal ulna dome. Alternative to ulnar shortening.
Recovery Timeline
• Splint: 2-4 weeks
• Light activity: 4-6 weeks
• Full activity: 6-8 weeks
• Fastest recovery option
• Long arm cast: 4-6 weeks (no rotation)
• Wrist exercises: 6-8 weeks
• Light activity: 3 months
• Full activity: 4-6 months
Evidence & References
- • Palmer AK. Triangular fibrocartilage complex lesions: a classification. J Hand Surg Am. 1989
- • Atzei A, Luchetti R. Foveal TFCC tear classification and treatment. Hand Clin. 2011
- • Haugstvedt JR, et al. Arthroscopic management of triangular fibrocartilage complex peripheral tears. J Hand Surg Am. 2006
- • McAdams TR, et al. The role of MRI in evaluation of TFCC injuries. J Hand Surg Am. 2007
Last Updated: January 2025 | Content reviewed by Dr. Deepthi Nandan Reddy, FRCS (Ortho)
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Dr. Deepthi Nandan Reddy
Senior Consultant Orthopaedic & Upper-Limb Surgeon | Apollo Hospitals
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