A Comprehensive Observation of the Morphology and the Neurovascular Pattern of the Triangular Fibrocartilage Complex (TFCC) of the Wrist Joint

Sep 30, 2026

Uploaded by Mary Man

Study evaluates the distinctive morphologic dimensions and neurovascular organization of the triangular fibrocartilage complex (TFCC) of the wrist, integrating digital Vernier measurements, auramine chloride staining (Palmgren’s method), and immunohistochemistry. Twenty formalin-embalmed human cadaver upper limbs supplied tissue for gross inspection, fixation, paraffin embedding, and 5–7 µm sectioning. Morphometric and staining results assess seven TFCC components, demonstrating no side-to-side morphometric differences, minimal nerve innervation in the articular disc, and denser nerves and vascularity in proximal regions.

LanguageEnglish

CategoryHealthcare

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Pages9

Reading Time23 min

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Abstract

Objectives

Methods

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RESEARCH ARTICLE A Comprehensive Observation of the Morphology and the Neurovascular Pattern of the Triangular Fibrocartilage Complex [TFCC] of the Wrist Joint Nandini Rajaram, MD; Dinesh Kumar V., MD Research performed at Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry Received: 25 November 2024 Accepted: 12 April 2025 Abstract Objectives: This study aims to provide a comprehensive understanding of the unique morphological dimensions and neurovascular pattern of the triangular fibrocartilage complex (TFCC) of the wrist joint, using innovative techniques such as digital Vernier calliper, aura mine chloride (Palmgren ’ s method) and immunohistochemistry. Methods: Samples were collected from 20 formalin-embalmed human cadavers. The morphometric parameters were measured. After gross examination, tissues were placed in 10% neutral buffered formalin for fixation. Paraffinembedded blocks were prepared, and tissue sections were taken at 5-7 microns thickness. The slides were subjected to Palmgren’s and immunohistochemistry staining following a standardised protocol. Results: The morphometric parameters of the articular disc (AD) and neurovascular pattern of the seven components of TFCC were assessed. There was no significant difference in the morphometric parameters between either sides of the limb. The AD had minimal nerve fibre innervation. Periphery of the complex, which consisted of different ligaments, showed higher nerve density comparatively. The distribution of nerve fibres predominated in the proximal portion compared to distal areas of TFCC. The vascular pattern observed in various components showed fewer blood vessels in the AD than in the periphery. Higher vascularity was observed in the proximal portion of the TFCC complex. Conclusion: The insights gained from this study, particularly the understanding of the innervation and distribution of nerve fibres of TFCC, can significantly enhance the effectiveness of selective denervation procedures during wrist arthroscopy. Moreover, the knowledge about the vascularity of TFCC is a crucial factor that can influence the end outcomes of wrist surgeries. Level of evidence: IV Keywords: Neurovascular pattern , Triangular fibrocartilage complex, Wrist joint Introduction T The wrist joint is a complex joint with many movements.1 The triangular fibrocartilage complex (TFCC) is one of the critical structures to maintain stability and facilitate the functional performance of the joint.2 The complex anatomy of the ulnar side of the wrist offers excellent challenges in understanding, diagnosing and treating its pathologies. The complex nature of this structure makes it difficult to arrive at a consensus in the management of pathologies in this joint. Ulnar wrist pain is oneof the most common wrist problems perceived by hand surgeons. It may be acute or chronic and includes the following causes: fractures, dislocations, ligament injuries, avascular necrosis, and degenerative changes affecting the ulnar carpus and distal radioulnar joint. In the elderly groups, wrist pain has been emerging as an essential treatment modality, making the entire focus on the wrist joint. It has been noted that TFCC remains the most recognised cause of ulnar wrist pain.3 This urges us to analyse the complex anatomical and biomechanical structure ofTFCC. The triangular fibrocartilage complex (TFCC) is a complicated ligamentous fibrocartilaginous structure composed of multiple anatomical structures located in the ulnar aspect of the human wrist separating the radiocarpal and distal radioulnar joints. TFCC has seven distinct components: “the articular disc )AD), the volar radioulnar ligament (VRUL), the dorsal radioulnar ligament (DRUL), the ulno lunate (UL), the ulno triquetral ligaments (UT q), the sub sheath of the extensor carpi ulnaris (SS-ECU) tendon and the ulnocarpal meniscoid structure (UCM).4 Extra-articular tissues, especially nerves and t

FAQs

What is the main goal of this study on the TFCC?

To define the TFCC’s unique morphology and its neurovascular pattern in the wrist joint, using digital morphometry, Palmgren’s staining, and immunohistochemistry.

How were the tissue samples prepared and analyzed?

Samples from 20 formalin-embalmed cadavers were examined grossly, fixed in 10% neutral buffered formalin, embedded in paraffin, sectioned at 5–7 microns, and stained using Palmgren’s and immunohistochemistry protocols.

What neurovascular distribution patterns were found in the TFCC?

The articular disc showed minimal nerve innervation and fewer blood vessels than the periphery, while nerve fiber distribution and vascularity were more prominent in proximal TFCC regions.

Sep 30, 2026

Uploaded by Mary Man