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Fibulotalocalcaneal Ligament: Magnetic Resonance Imaging Findings With Cadaver Correlation

Peduto, Anthony J. MBBS, FRANZCR*†; Numkarunarunrote, Numphung MD*‡; Trudell, Debra J. RA*; Resnick, Donald L. MD*

Journal of Computer Assisted Tomography:
doi: 10.1097/RCT.0b013e318184cd89
Musculoskeletal Imaging
Abstract

Objective: The objectives of this study were to determine whether the fibulotalocalcaneal (FTC) ligament of the ankle, described in anatomical literature, can be identified on magnetic resonance (MR) imaging studies.

Methods: Magnetic resonance imaging was performed on 6 cadaver ankles, which were then sectioned axially. The posterolateral ankle was inspected on MR imaging and cadaver sections for ligamentous thickening corresponding to the components of the FTC ligament: main stem and talar and peroneocalcaneal laminae.

Results: The entire FTC ligament or components of it were seen in 5 (83%) of 6 ankles. In 3 (50%) of 6, all 3 components were present. The main stem of the FTC ligament attached to the posteromedial aspect of the lateral malleolus and then divided inferiorly into 2 laminae: The talar lamina extended horizontally to the talus, and the peroneocalcaneal lamina descended vertically to the calcaneus.

Conclusions: The FTC ligament is a sheetlike extrinsic ligament, which is in continuity with the deep posterior crural fascia of the ankle and is visible on MR imaging.

Author Information

From the *Department of Radiology, Veterans Affairs Healthcare System, San Diego, CA; †Department of Radiology (Centre for Biomedical Imaging Research and Development), Westmead Hospital, Western Clinical School of The University of Sydney, Sydney, Australia; and ‡Department of Radiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.

Received for publication December 19, 2007; accepted June 25, 2008.

Reprints: Anthony J. Peduto, MBBS, FRANZCR, Department of Radiology, Westmead Hospital, Western Clinical School of The University of Sydney, Darcy Road, Westmead, Sydney, Australia 2145 (e-mail: tonypeduto@yahoo.com).

© 2009 Lippincott Williams & Wilkins, Inc.