The Centers for Advanced Orthopaedics
Maryland Orthopedic Specialists
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Hand & Wrist

TFCC Injury (Triangular Fibrocartilage Complex)

TFCC injury is a leading cause of ulnar-sided wrist pain — the aching, clicking, or weakness located on the little-finger side of the wrist. The triangular fibrocartilage complex is the primary stabilizer of the distal radioulnar joint and cushions the ulnocarpal space. Injuries range from acute tears (from a fall or twisting injury) to chronic degenerative wear. Because TFCC injuries are frequently misdiagnosed as simple "wrist sprains," many patients live with months or years of pain before receiving proper treatment. The hand surgeons at Maryland Orthopedic Specialists have expertise in the full spectrum of TFCC management, including wrist arthroscopy for both diagnosis and treatment.

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What is tfcc injury (triangular fibrocartilage complex)?

A TFCC injury is damage to the triangular fibrocartilage complex, a network of cartilage and ligaments on the little-finger side of the wrist that cushions and stabilizes the joint. It can tear from a fall or repetitive loading, causing pain, clicking, and weakness with rotation and gripping.

The triangular fibrocartilage complex (TFCC) is a collection of ligamentous and cartilaginous structures that occupy the ulnocarpal space — the area between the ulnar head, the ulnar carpus (lunate and triquetrum), and the sigmoid notch of the radius. Its components include:

  • Triangular fibrocartilage proper (articular disc): A fibrocartilage disc that cushions forces transmitted through the ulnar side of the wrist and allows smooth forearm rotation.
  • Radioulnar ligaments (dorsal and volar): The primary stabilizers of the distal radioulnar joint (DRUJ); critical for forearm rotation.
  • Meniscus homologue and ulnocarpal ligaments: The ulnolunate and ulnotriquetral ligaments stabilize the ulnar carpus.
  • Extensor carpi ulnaris (ECU) subsheath: Contributes to DRUJ stability.

Functions of the TFCC

  1. Stabilizes the DRUJ — enables pronation and supination of the forearm
  2. Transmits load from the wrist to the forearm — approximately 20% of axial wrist load passes through the ulnocarpal space in neutral ulnar variance
  3. Suspends the ulnar carpus (lunate and triquetrum) from the distal radius

Palmer Classification

The most widely used classification system for TFCC injuries distinguishes:

Type 1 — Traumatic Injuries:

  • 1A: Central disc perforation (the most common acute traumatic lesion)
  • 1B: Ulnar (peripheral) avulsion — from the fovea of the ulnar head; associated with DRUJ instability; most repairable
  • 1C: Volar ulnocarpal ligament disruption
  • 1D: Radial avulsion from the sigmoid notch; associated with DRUJ instability

Type 2 — Degenerative Injuries (Ulnocarpal Abutment Syndrome):

  • Staged from 2A (disc wearing) to 2E (complete disc perforation with lunotriquetral and lunate chondromalacia, associated with positive ulnar variance)

Understanding the Palmer classification guides the choice between repair, debridement, and ulnar-shortening procedures.

Treatment options

Non-Operative

Wrist immobilization in a cast or brace for 4 to 6 weeks gives partial tears the chance to heal on their own. Anti-inflammatory medication and activity modification help manage symptoms during recovery.

Surgical Procedure

TFCC Repair (Triangular Fibrocartilage Complex)

Arthroscopic treatment of TFCC injuries causing ulnar-sided wrist pain. Degenerative tears are managed with debridement; peripheral tears with healing potential are repaired with arthroscopic suture technique.

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Wrist Arthroscopy

Diagnostic and operative arthroscopic evaluation of the wrist joint to assess and treat TFCC tears, scapholunate ligament injuries, synovitis, and loose bodies with minimal disruption to surrounding structures.

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Frequently Asked Questions

How is TFCC injury different from a wrist sprain?
A "wrist sprain" is a non-specific term. True TFCC injuries involve specific ligamentous or cartilage damage that requires accurate diagnosis and tailored treatment. Persistent ulnar-sided wrist pain after a "sprain" should always be formally evaluated.
Do all TFCC tears need surgery?
No. Many central (Type 1A) perforations and early degenerative tears respond well to conservative management. Surgery is reserved for failed conservative treatment, peripheral tears with DRUJ instability, or significant functional limitation.
Is MRI or MRI arthrogram better?
MRI arthrogram (with joint injection of contrast) is significantly more accurate for detecting TFCC tears and characterizing tear type and location than standard MRI. We routinely order MRI arthrogram for diagnostic workup of suspected TFCC injury.
What is ulnar variance and why does it matter?
Ulnar variance is the relative height of the distal ulna compared to the distal radius. Positive ulnar variance means the ulna is relatively long, increasing the load on the TFCC. It is an important driver of degenerative TFCC disease and influences the choice between debridement and ulnar shortening.
How long does recovery take after TFCC repair surgery, and when can I return to activity?
After TFCC repair surgery, the wrist is typically immobilized in a cast or splint for four to six weeks to protect the healing fibrocartilage. Formal hand therapy then focuses on restoring forearm rotation, wrist motion, and grip strength over the following two to three months. Return to light daily activities usually occurs by eight to twelve weeks, while sports or manual labor requiring forceful gripping and rotation may take four to six months. Your MOS wrist surgeon will confirm healing with clinical assessment and, if needed, imaging before advancing your activity level to ensure the repair does not re-tear.

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Peter G. Fitzgibbons, MD

Peter G. Fitzgibbons, MD

Hand Surgery · Orthopedic Surgery

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Related conditions

Scaphoid FractureGanglion CystHand & Wrist Arthritis
Medically reviewed by Peter G. Fitzgibbons, MD, MD
Last reviewed May 1, 2026

References

  1. Palmer AK. Triangular fibrocartilage complex lesions: a classification. Journal of Hand Surgery (American Volume). 1989;14(4):594–606. doi:10.1016/0363-5023(89)90174-6
  2. Nakamura T, Makita A. The proximal arch of the triangular fibrocartilage complex. Journal of Hand Surgery (British Volume). 2000;25(5):479–486. doi:10.1054/jhsb.2000.0435
  3. Wysocki RW, Richard MJ, Crowe MM, Ruch DS. Arthroscopic treatment of peripheral triangular fibrocartilage complex tears with the deep radioulnar ligament repaired using the foveal approach. Journal of Hand Surgery (American Volume). 2012;37(3):509–516. doi:10.1016/j.jhsa.2011.11.010
  4. Lindau T. Arthroscopic evaluation of associated soft tissue injuries in distal radius fractures. Hand Clinics. 2017;33(4):651–658. doi:10.1016/j.hcl.2017.07.004
  5. Atzei A, Luchetti R. Foveal TFCC tear as a cause of distal radioulnar joint instability: diagnosis and treatment. Journal of Hand Surgery (European Volume). 2011;36(8):1–16. doi:10.1177/1753193411409708