TRIANGULAR FIBROCARTILAGE COMPLEX (TFCC)

What Is the Triangular Fibrocartilage Complex (TFCC)?

The triangular fibrocartilage complex (TFCC) is a structure in the wrist that plays a crucial role in its stability and function. It’s a group of cartilage, ligaments and tendons located on the ulnar side of the wrist, between the end of the ulna (one of the two forearm bones) and the small bones of the wrist.

The wrist triangular fibrocartilage acts as a shock absorber, reducing friction and distributing forces across the wrist, while also helping maintain stability at the distal radioulnar joint (DRUJ). Also known as a TFCC wrist injury or triangular cartilage injury, TFCC problems are one of the most common causes of ulnar-sided wrist pain we see in clinic.

Common Symptoms of a TFCC Wrist Tear

The most common symptom of a TFCC wrist injury is pain on the ulnar (little-finger) side of the wrist, which may worsen with activity, particularly twisting or gripping. Other symptoms of a TFCC injury wrist presentation include:

Swelling on the ulnar side of the wrist, tender to touch
A clicking or catching sensation with wrist movement
Reduced grip strength
Discomfort when rotating the forearm

Pain is often described as being centred in the TFCC, specifically TFCC in the wrist on the ulnar side, distinguishing it from other causes of wrist pain.

What Is a TFCC Tear or Injury?

A TFCC tear occurs when this cartilage complex is damaged, either through a specific injury — such as a fall onto an outstretched hand — or gradually through repetitive strain and wear. A tear of the TFCC can affect any part of the complex, and injuries are often described by location, such as a tear in the TFCC or a tear of the triangular fibrocartilage closer to the ulna.

A tear triangular fibrocartilage injury and a tri fibrocartilage tear describe the same underlying condition — damage to this cartilage structure — and are sometimes used interchangeably by patients searching for information.

In more severe cases, a TFCC rupture can occur, causing a sudden increase in pain and instability. Common causes of TFCC injuries include falls, repetitive twisting movements (such as those in racquet sports), and degenerative wear over time. Damage to the TFCC ligament specifically can also contribute to instability at the wrist.

A triangular fibrocartilage complex injury or triangular fibrocartilage injury more broadly can range from a minor strain to a full-thickness tear, and the appropriate treatment depends on the severity and location of the damage.

TFCC Treatment at Alton Pain Clinic

Ultrasound-Guided Cortisone Injection

At Alton Pain Clinic, our approach to triangular fibrocartilage tear treatment centres on ultrasound-guided cortisone injections. The injection aims to decrease inflammation of the TFCC (or any associated structures) and relieve pain, with the goal of improving wrist function and making rehabilitation — such as physiotherapy — more effective.

Benefits of ultrasound guidance include:

Increased accuracy — real-time visualisation ensures precise needle placement
Reduced risk of complications — minimised risk of damage to surrounding nerves and blood vessels
Targeted relief — medication delivered directly to the site of inflammation

Your Care Pathway with us

To book an appointment you can call our reception line, 0142084487, or email to info@altonpainclinic.co.uk or click the button given below.
Comprehensive Musculoskeletal examination and testing.
Same day Ultrasound Guided Injection for pain relief.
Discussion of your treatment plan, treatment plan can include advanced treatments for example Cortisone Injections, Hyaluronic injections and various other options tailored to your specific needs.

TFCC Anatomy

The triangular fibrocartilage complex (TFCC) is a critical structure in the wrist, located on the ulnar (pinky) side of the joint. It helps maintain wrist stability, particularly in the distal radioulnar joint (DRUJ), and plays a role in absorbing forces and facilitating wrist movements.

Articular Disc

The articular disc is a triangular piece of fibrocartilage situated between the ulna and the carpal bones (specifically, the lunate and triquetrum) — it’s the central structure most people mean when they refer to a triangular cartilage of wrist injury. This disc acts as a shock absorber, reducing friction and distributing forces across the wrist. It provides a smooth interface between the ulna and carpal bones, allowing for efficient motion.

Supporting Ligaments

Ulnar Collateral Ligament (UCL): positioned on the ulnar side of the wrist, connecting the ulna to the carpal bones and other wrist structures. This ligament stabilises the wrist by preventing excessive side-to-side motion and plays a key role in maintaining the integrity of the TFCC.

Dorsal and Volar Radioulnar Ligaments: the dorsal radioulnar ligament, on the back of the wrist, connects the radius to the ulna at the wrist joint, stabilising the distal radioulnar joint (DRUJ). The volar radioulnar ligament, on the front of the wrist, also stabilises the DRUJ and helps prevent excessive movement between the radius and ulna during wrist rotation. Both ligaments are critical in stabilising the DRUJ and preventing instability during rotational wrist movements, such as turning the palm up or down.

Meniscus Homologue

A small, fibrocartilaginous structure that acts as a meniscus-like tissue in the wrist, located between the ulna and the carpal bones (lunate and triquetrum). It helps improve the fit between the bones of the wrist, promoting stability and smooth motion, and aids in shock absorption and load transmission.

TFCC Ligament Varieties

Palmar TFCC Ligament: reinforces the palmar (front) side of the wrist.

Dorsal TFCC Ligament: located on the back of the wrist, helping stabilise the joint, particularly during wrist extension and twisting.

Function of the TFCC as a Whole

Wrist stability: the TFCC provides critical support for the distal radioulnar joint (DRUJ), where the radius and ulna meet at the wrist.
Shock absorption: the TFCC, especially the articular disc, helps absorb and distribute forces transmitted through the wrist during activities like gripping, lifting or weight-bearing.
Load transmission: it plays a role in transferring forces between the radius and ulna, helping ensure weight-bearing is distributed evenly across the wrist.
Movement facilitation: the TFCC helps allow for smooth rotational movements of the wrist, such as supination and pronation, which are essential for actions like turning a doorknob or rotating the hand.

How Is a TFCC Injury Diagnosed?

Diagnosis typically begins with a clinical assessment, including a TFCC test — a physical examination technique your clinician uses to reproduce symptoms and assess ligament stability. This is often followed by an ultrasound scan, which allows real-time visualisation as part of a triangular fibrocartilage complex test to confirm the extent of injury.

Frequently Asked Questions - FAQs

What does a TFCC tear feel like?

A TFCC tear typically causes pain on the ulnar side of the wrist, often with clicking, reduced grip strength, and discomfort when twisting or rotating the forearm.

How is a TFCC injury tested for?

Your clinician will carry out a physical TFCC test to assess ligament stability and reproduce symptoms, usually alongside an ultrasound scan to confirm the diagnosis.

What causes a TFCC rupture?

A TFCC rupture can result from a fall onto an outstretched hand, a sudden twisting injury, or repetitive strain from activities involving gripping and rotating the wrist.

How long does TFCC injury treatment take to work?

Many patients notice improved comfort and function within days to weeks of an ultrasound-guided cortisone injection, though it varies from person to person.

Is a TFCC tear the same as a triangular cartilage injury?

Yes — “triangular cartilage injury” and “triangular fibrocartilage complex injury” both describe the same condition. Patients and clinicians sometimes use the shorter phrase, but it refers to the same TFCC structure on the ulnar side of the wrist.