Summary Triangular Fibrocartilage Complex (TFCC) Injuries, a common cause of ulnar-sided wrist pain, may result from trauma or due to degenerative changes. Diagnosis is made clinically with ulnar sided wrist pain that is worse with ulnar deviation and a positive "fovea" sign. An MRI can help confirm diagnosis. Treatment is generally conservative with NSAIDs and immobilization. Surgical debridement, TFCC repair or ulnar shortening procedures may be indicated depending on severity of symptoms and underlying cause. Etiology Mechanism of TFCC injury Type 1 traumatic injury mechanism most common is fall on extended wrist with forearm pronation traction injury to ulnar side of wrist traction injury to ulnar wrist Type 2 degenerative injury associated with positive ulnar variance associated with ulnocarpal impaction Anatomy TFCC made up of dorsal and volar radioulnar ligaments deep lig, known as ligamentum subcruentum, attach to the ulnar fovea superficial fibers attach to the ulnar styloid central articular disc meniscus homolog ulnar collateral ligament ECU subsheath origin of ulnolunate and ulnotriquetral ligaments Blood supply periphery is well vascularized (10-40% of the periphery) central portion is avascular Origin dorsal and volar radioulnar ligaments originate at the sigmoid notch of the radius Insertion dorsal and volar radioulnar ligaments converge at the base of the ulnar styloid deep fibers insert on to the ulnar fovea superficial fibers insert on the ulnar styloid Classification Class 1 - Traumatic TFCC Injuries 1A Central perforation or tear 1B Ulnar avulsion (without ulnar styloid fx) 1C Distal avulsion (origin of UL and UT ligaments) 1D Radial avulsion Class 2 - Degenerative TFCC Injuries 2A TFCC wear and thinning 2B 2A + Lunate and/or ulnar chondromalacia 2C 2B + TFCC perforation 2D 2C + Ligament disruption 2E 2D + Ulnocarpal and DRUJ arthritis Presentation Symptoms wrist pain turning a door key often painful Physical exam positive "fovea" sign tenderness in the soft spot between the ulnar styloid and flexor carpi ulnaris tendon, between the volar surface of the ulnar head and the pisiform 95% sensitivity and 87% specificity for foveal disruptions of TFCC or ulnotriquetral ligament injuries pain elicited with ulnar deviation (TFCC compression) or radial deviation (TFCC tension) Imaging Radiographs usually negative zero rotation PA view evaluates ulnar variance dynamic pronated PA grip view may show pathology Arthography joint injection shows extravasation MRI has largely replaced arthrography tear at ulnar part of lunate indicates ulnocarpal impaction sensitivity = 74-100% Arthroscopy most accurate method of diagnosis indicated in symptomatic patients after failing several months of splinting and activity modification Differential Ulnocarpal abutment syndrome Ulnar styloid impaction syndrome ECU tendonitis Hook of hamate fracture Ulnar tunnel syndrome Pisotriquetral arthritis Treatment Nonoperative immobilization, NSAIDS, steroid injections indications all acute Type I injuries first line of treatment for Type 2 injuries Operative arthroscopic debridement indications type 1A diagnostic gold standard arthroscopic repair indications type 1B, 1C, 1D best for ulnar and dorsal/ulnar tears generally acute, athletic injuries more amenable to repair than chronic injuries outcomes patient should expect to regain 80% of motion and grip strength when injuries are classified as acute (<3 months) ulnar diaphyseal shortening indications Type II with ulnar positive variance is > 2mm advantage of effectively tightening the ulnocarpal ligaments and is favored when LT instability is present Wafer procedure indications Type II with ulnar positive variance is < 2mm type 2A-C limited ulnar head resection indications type 2D Darrach procedure indications contraindicated due to problems with ulnar stump instability Techniques Arthroscopic debridement approach arthroscopic approach to the wrist performed through combination of 3-4 and 6R portal technique maintain 2 mm rim peripherally otherwise joint can become unstable pros & cons not effective if patient has ulnar positive variance 80% of patients obtain good relief of pain Arthroscopic repair approach arthroscopic approach to the wrist technique many techniques exist such as outside-in and inside-out generally suture based repair pros & cons only works for peripheral tears where blood supply is present patient immobilized for 6 weeks complications ECU tendonitis from suture knot dorsal sensory nerve injury Ulnar diaphyseal shortening approach dorsal approach to the forearm technique osteotomy of the diaphysis or metaphysis followed by plate fixation pros & cons can address > 2 mm ulnar variance requires immobilization and time for fracture healing can help tension the ulnocarpal ligaments complications nonunion hardware irritation necessitating removal Wafer procedure approach dorsal approach to the forearm technique ulnar cortex is not disrupted do not extend bone removal into the DRUJ pros & cons intrinsic stability of ECU, TFCC, and ulnar periosteum obviate need for plate fixation Limited ulnar head resection approach arthroscopic approach to the wrist technique removal of approximately 2-4 mm of bone under the TFCC distal ulnar burred through central TFCC defect pros & cons can be technically difficult to obtain level shortening through TFCC window only applicable when patient has < 2mm of ulnar variance Darrach procedure approach dorsal approach to the forearm technique resection of the distal 1-2cm of the distal ulna TFCC should be approximated to the wrist capsule pros & cons salvage procedure for pain relief only distal joint is unstable complications ECU tendon can sublux over remaining ulna causing pain
QUESTIONS 1 of 7 1 2 3 4 5 6 7 Previous Next (SBQ17SE.8) A 34-year-old right-hand-dominant squash player falls onto an outstretched hand during a qualifying match. Since this fateful match, he has had ulnar-sided wrist pain, decreased range of motion, and periodic clicking in his wrist. The physical exam finding in Figure A is noted, in which you are able to manipulate and easily translate the ulna against the radius. This finding is not present on his contralateral wrist. The deep portion of the injured ligamentous structure inserts on what anatomical landmark? QID: 211193 FIGURES: A Type & Select Correct Answer 1 Ulnar styloid 23% (419/1822) 2 Ulnar fovea 49% (897/1822) 3 Dorsal radio-ulnar capsule 16% (283/1822) 4 Dorsal oblique band of the interosseous membrane 10% (191/1822) 5 Radial styloid 1% (20/1822) L 1 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (OBQ13.65) A 30-year-old male laborer sustained a right wrist injury 9 months ago. He continues to have symptoms of recurrent ulnar-sided wrist pain that impairs his ability to work. An MRI is performed and shows a triangular fibrocartilage complex (TFCC) injury. Which of the following is an indication to combine a Wafer procedure with arthroscopic TFCC debridement? QID: 4700 Type & Select Correct Answer 1 Ulnar styloid fracture 2% (133/5644) 2 Radial styloid fracture 0% (24/5644) 3 2 mm of positive ulnar variance and ulnocarpal impingment 91% (5139/5644) 4 2 mm of negative ulnar variance and radiocarpal joint arthritis 4% (202/5644) 5 Scapholunate ligament injury 2% (93/5644) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (SBQ07SM.61) A 20-year-old park ranger trips and falls onto his right wrist with the wrist in extension and pronation. The local urgent care orders both radiographs and a CT, which you review and determine to be normal. The patient complains of ulnar-sided wrist pain. On exam, his tenderness is localized to the fovea. Ulnar deviation also causes him pain. There is no snapping sensation with wrist supination, flexion, and ulnar deviation. He otherwise has 5/5 strength to his first dorsal interosseous muscle with 4mm static two-point discrimination on the ulnar side of the 4th digit. Which of the following injuries is most likely responsible for his symptoms and exam? QID: 1446 Type & Select Correct Answer 1 TFCC tear 89% (1393/1558) 2 Ulnar styloid fracture 2% (30/1558) 3 Hook of hamate fracture 4% (60/1558) 4 Ulnar nerve injury in Guyon's canal 3% (45/1558) 5 ECU subluxation 1% (19/1558) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic This is an AAOS Self Assessment Exam (SAE) question. Orthobullets was not involved in the editorial process and does not have the ability to alter the question. If you prefer to hide SAE questions, simply turn them off in your Learning Goals. (SAE07SM.3) The most common mechanism of injury to the triangular fibrocartilage complex (TFCC) involves QID: 8665 Type & Select Correct Answer 1 wrist extension and forearm pronation. 57% (538/948) 2 wrist extension and forearm supination. 15% (142/948) 3 wrist flexion and forearm pronation. 4% (41/948) 4 wrist flexion and forearm supination. 4% (40/948) 5 axial load in ulnar deviation. 19% (182/948) L 4 Question Complexity E Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic (SBQ07SM.3) A 19-year-old football player suffers a fall onto a pronated, extended wrist. He has pain with resisted ulnar deviation and is tender to palpation just distal to the ulnar styloid. He has no tenderness over the extensor carpi ulnaris (ECU) tendon. Current radiographs are shown in in Figures A and B and and MRI of the wrist is shown in FIgure C. Which of the following is the most likely diagnosis? QID: 1388 FIGURES: A B C Type & Select Correct Answer 1 ECU tendon rupture 1% (26/3430) 2 Triangular fibrocartilaginous complex (TFCC) tear 90% (3091/3430) 3 Hook of hamate fracture 6% (190/3430) 4 Scapholunate ligament injury 1% (42/3430) 5 Perilunate dislocation 2% (68/3430) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (OBQ05.273) Which of the following structures is an anatomical component of the triangular fibrocartilage complex? QID: 1159 Type & Select Correct Answer 1 Extensor carpi ulnaris tendon sheath 73% (3661/5029) 2 Lunotriquetral interosseous ligament 8% (414/5029) 3 Extensor digiti minimi tendon sheath 2% (81/5029) 4 Radioscaphocapitate ligament 6% (287/5029) 5 Flexor carpi ulnaris tendon sheath 11% (553/5029) L 1 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic
All Videos (6) Podcasts (1) Login to View Community Videos Login to View Community Videos 2018 Baseball Sports Medicine: Game-Changing Concepts Wrist Injuries: Focus on Baseball - Melvin Rosenwasser, MD (BSM 2018, #39) Melvin Rosenwasser Hand - TFCC Injury A 12/21/2018 399 views 4.8 (4) Login to View Community Videos Login to View Community Videos California Orthopaedic Association Annual Meeting - 2017 TFCC Tears and Repair- Jeffrey Yao, M.D.(COA 2017, 5.2) Jeffrey Yao Hand - TFCC Injury A 4/12/2018 1108 views 4.6 (7) Login to View Community Videos Login to View Community Videos Frontiers in Upper Extremity Surgery - 2016 TFCC Repair - Luis Scheker, MD (Frontiers #5, 2016) Hand - TFCC Injury B 2/17/2017 649 views 4.0 (2) Hand ⎜ TFCC Injury Hand - TFCC Injury Listen Now 18:9 min 10/18/2019 1001 plays 4.5 (4) See More See Less