Przejdź do treściPain on the little-finger side of the wrist may come from the triangular fibrocartilage complex (TFCC), particularly when it begins after a fall onto the hand or a sudden twisting injury, or when it increases with forearm rotation and forceful gripping. TFCC injury is not the only possible cause. The extensor carpi ulnaris tendon, the distal radioulnar joint and other structures occupy the same region, so pain location alone is not enough to establish the diagnosis.
What is the TFCC?
The TFCC, or triangular fibrocartilage complex, is a group of fibrocartilaginous and ligamentous structures on the ulnar side of the wrist. It is an important stabiliser of the distal radioulnar joint, helps transmit load and acts as a cushion between the ulna and the carpal bones.
TFCC damage may be traumatic or degenerative. Traumatic tears can follow a fall onto an outstretched hand, sudden wrist rotation, sport or work involving strong forearm rotation. Degenerative changes more often develop gradually, particularly when the ulnar side of the wrist is subjected to chronic overload.
Which symptoms fit a TFCC injury?
Typical pain is felt on the ulnar side of the wrist, between the ulnar head and the carpal bones. It may be provoked by opening a jar, using a screwdriver, turning a door handle, gripping firmly, pushing up from the hand or using the hands to rise from a chair.
- pain with pronation and supination of the forearm,
- tenderness in the ulnar fovea region,
- clicking, catching or a sense that the wrist momentarily jams,
- reduced grip strength,
- a feeling of instability during forearm rotation.
Not every click represents clinically important damage. TFCC abnormalities can also be visible on imaging in people without symptoms, so MRI findings must always be interpreted together with the clinical examination.
What else can cause ulnar-sided wrist pain?
This is one of the more demanding areas of wrist diagnosis. Similar symptoms may arise from irritation or instability of the extensor carpi ulnaris (ECU) tendon, distal radioulnar joint instability, ulnocarpal impaction, lunotriquetral ligament injury, fracture of the ulnar styloid or hook of the hamate, and sometimes a ganglion.
How is TFCC injury diagnosed?
Clinical examination
The mechanism of injury and a careful examination are central. The clinician assesses the point of maximal tenderness, wrist motion, grip strength and distal radioulnar joint stability. Provocative tests that load the TFCC may also be used. No single manoeuvre is completely diagnostic, so findings must be considered together.
X-ray
After trauma, radiographs are often the first imaging test. They do not show the TFCC itself, but they can identify fractures, assess alignment and provide information such as ulnar variance, which can influence loading on the ulnar side of the wrist.
Ultrasound
Ultrasound can be valuable in the assessment of ulnar-sided wrist pain. It allows dynamic examination of the ECU tendon, parts of the TFCC and the distal radioulnar joint. It also has important limitations: a central TFCC disc tear cannot be reliably excluded with ultrasound. A normal scan therefore does not necessarily end the diagnostic process when symptoms continue to suggest an intra-articular lesion.
MRI
MRI provides detailed soft-tissue imaging and is commonly used when symptoms persist. It is not a perfect test. A diagnostic meta-analysis showed that conventional MRI can miss some TFCC tears and that accuracy varies with lesion location; peripheral tears can be particularly difficult to define unequivocally.
MR arthrography or CT arthrography may be used in selected situations, but they are not required for every patient with ulnar-sided wrist pain.
Arthroscopy
Arthroscopy allows direct inspection of the TFCC and other structures inside the wrist. It is the most direct method of assessing the lesion itself, but because it is an operative procedure it is not a routine first-line diagnostic test. It is most relevant when symptoms are substantial, non-operative treatment has failed, or a lesion is suspected that can be treated during the same procedure.
Does every TFCC tear require surgery?
No. Stable traumatic TFCC tears without distal radioulnar joint instability can often be treated non-operatively first. A 2024 systematic review including 425 patients and 427 wrists found that appropriately selected non-operative management can produce good functional outcomes. Distal radioulnar joint instability or subluxation and complete foveal detachment were associated with a greater risk of failure of conservative treatment.
The studies included in that review used different treatment protocols, so they do not support one universal immobilisation regimen. The type and duration of bracing should reflect the injury pattern and joint stability rather than the MRI report alone.
What does non-operative treatment involve?
Initially, activities that reproduce pain are usually reduced, particularly forceful gripping, rotation and weight bearing through the hand. Depending on the injury, temporary immobilisation or a brace may be used, followed by progressive restoration of movement and loading.
Analgesic or anti-inflammatory medication can be used in selected patients when appropriate. Hand therapy may then help restore motion, strength and control without repeatedly overloading the injured region.
An injection may occasionally be considered to reduce associated pain or inflammation, but an injection does not repair or “suture” a torn TFCC. When accurate needle placement matters, image guidance can be useful. See: Injection Treatments.
When does an orthopaedic surgeon consider surgery?
Surgery is considered more often when pain continues to limit function despite appropriate non-operative treatment or when clinically important distal radioulnar joint instability is present from the outset. The type and location of the lesion are important.
Peripheral and foveal tears, particularly those associated with instability, may be suitable for repair. The central disc has a much poorer blood supply, so some symptomatic central tears are treated by arthroscopic debridement of unstable tissue rather than suturing. When ulnocarpal impaction is also present, treatment may need to address the underlying bony anatomy.
Can the TFCC heal on its own?
Healing potential depends partly on lesion location. The peripheral TFCC has a better blood supply than the central portion and therefore greater biological healing potential. Clinically, however, the more important question is whether the wrist regains stable, painless function rather than whether the structural tear disappears on imaging. Symptoms can improve without surgery even when structural changes remain visible.
When should assessment not be delayed?
Earlier assessment is required after a more substantial injury when there is deformity, rapidly increasing swelling, marked inability to rotate the forearm or move the wrist, major loss of strength or concern about a fracture. Urgent assessment is also needed if the hand becomes pale or cold, new sensory loss develops, there is an open wound, or signs of infection such as increasing redness, fever and marked warmth appear.
For less acute symptoms, review is appropriate when ulnar-sided wrist pain persists despite reducing load, repeatedly returns during ordinary activities, or is accompanied by catching or a sense of instability.
Key points
Ulnar-sided wrist pain can result from a TFCC injury, but diagnosis requires the history, an assessment of wrist and distal radioulnar joint stability, and appropriately selected imaging. Ultrasound and MRI answer somewhat different questions, and neither replaces the clinical examination. Stable traumatic injuries can often be managed without surgery initially, whereas persistent pain combined with distal radioulnar joint instability requires more detailed assessment and more often leads to consideration of repair.
References
- Choi SI, Malik S, MacLean S. The Natural History of Non-operatively Treated Traumatic Triangular Fibrocartilage Complex Tears: A Systematic Review. J Wrist Surg. 2024;13(6):550-558. DOI: 10.1055/s-0044-1786164.
- Zhou JY, Tuyishime H, Yao J. Arthroscopic-Assisted Repair of the Triangular Fibrocartilage Complex. J Hand Surg Glob Online. 2024;6(4):445-457. DOI: 10.1016/j.jhsg.2024.03.011.
- Treiser MD, Crawford K, Iorio ML. TFCC Injuries: Meta-Analysis and Comparison of Diagnostic Imaging Modalities. J Wrist Surg. 2018;7(3):267-272. DOI: 10.1055/s-0038-1629911.
- Winnett M, et al. Sonographic Anatomy and Imaging of the Triangular Fibrocartilage Complex and the Distal Radio-Ulnar Joint. Australas J Ultrasound Med. 2025. DOI: 10.1002/ajum.70012.
Content prepared by: Tomasz Poboży - orthopaedic surgeon.