Semin Musculoskelet Radiol 2012; 16(02): 093-103
DOI: 10.1055/s-0032-1311761
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Anatomy and Variants of the Triangular Fibrocartilage Complex and Its MR Appearance at 3 and 7T

Iris-M. Nöbauer-Huhmann
1   Department of Radiology, MR Centre-Highfield MR, Medical University of Vienna, Vienna, Austria.
2   Department of Radiology, Division of Neuroradiology and Musculoskeletal Radiology, Medical University of Vienna, Vienna, Austria.
,
Michael Pretterklieber
3   Department of Applied Anatomy, Medical University of Vienna, Vienna, Austria.
,
Jochen Erhart
4   Department of Trauma Surgery, Medical University of Vienna, Vienna, Austria.
,
Peter Bär
5   Siemens AG, Siemens Deutschland, Healthcare Sector, Erlangen, Germany.
,
Pavol Szomolanyi
1   Department of Radiology, MR Centre-Highfield MR, Medical University of Vienna, Vienna, Austria.
6   Department of Imaging Methods, Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Slovakia.
,
Claudia Kronnerwetter
1   Department of Radiology, MR Centre-Highfield MR, Medical University of Vienna, Vienna, Austria.
,
Susanna Lang
7   Department of Pathology, Medical University of Vienna, Vienna, Austria.
,
Klaus M. Friedrich
1   Department of Radiology, MR Centre-Highfield MR, Medical University of Vienna, Vienna, Austria.
2   Department of Radiology, Division of Neuroradiology and Musculoskeletal Radiology, Medical University of Vienna, Vienna, Austria.
,
Siegfried Trattnig
1   Department of Radiology, MR Centre-Highfield MR, Medical University of Vienna, Vienna, Austria.
2   Department of Radiology, Division of Neuroradiology and Musculoskeletal Radiology, Medical University of Vienna, Vienna, Austria.
› Author Affiliations
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Publication History

Publication Date:
30 May 2012 (online)

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Abstract

Due to the small size and complexity of its constituents, the triangular fibrocartilage complex (TFCC) has been a challenging structure for magnetic resonance (MR) imaging. Higher-field MR units, at 3T and 7T, with increased spatial resolution and the development of novel MR sequences, are promising tools for an improved visualization of the ulnocarpal complex. Anatomically, the TFCC consists of the TFC proper, the ulnomeniscal homolog, the ulnar collateral ligament, the ulnotriquetral and ulnolunate ligament, and radioulnar ligaments at the volar (palmar) and the dorsal side, as well as the sheath of the extensor carpi ulnaris tendon and the capsule of the distal radioulnar joint. This article describes the normal anatomy of the TFCC and its appearance on high-field MRI. Anatomical variants, such as the positive ulnar variance, and changes during pronation and supination are addressed.