Daichi Hayashi MBBS, PhD, Presenter: Nothing to Disclose

Frank W. Roemer MD, Abstract Co-Author: Chief Medical Officer, Boston Imaging Core Lab LLC Research Director, Boston Imaging Core Lab LLC Shareholder, Boston Imaging Core Lab LLC

Pieter D'hooghe MD, Abstract Co-Author: Nothing to Disclose

Ali Guermazi MD, PhD, Abstract Co-Author: President, Boston Imaging Core Lab, LLC Research Consultant, Merck KgaA Research Consultant, Sanofi-Aventis Group Research Consultant, TissueGene, Inc

To review relevant anatomy of posterior ankle To describe different types of posterior ankle impingement syndromes due to traumatic and non-traumatic osseous and soft tissue pathology To describe the approach to imaging of these pathologies and illustrate their imaging features, including relevant differential diagnoses  

1. Introduction 2. Anatomy of posterior ankle 3. Imaging protocol for posterior ankle evaluation 4. Pathogenesis, clinical features, imaging findings and differential diagnoses Bony lesions: fracture of posterolateral talar process; presence of os trigonum; osteophytes at the posterior margin of the tibial plafond and posteroinferior osteophytes of posterolateral talar process; loose bodies in the posterior recesses or posterior subtalar joint Posteromedial soft tissue lesions: posterior tibiotalar ligament injury; posteromedial gutter synovitis and scar; avulsion fractures of posteromedial process of the talus at the insertion of posterior tibiotalar ligament Posterolateral soft tissue lesions: posterior intermalleolar ligament injury; displaced distal tear of the calcaneofibular ligament Anomalous and accessory muscles 5. Conclusion: Multimodality imaging readily identifies predisposing factors and distinct manifestations of posterior impingement syndromes

http://abstract.rsna.org/uploads/2014/14001909/14001909_xpbz.pdf

Hayashi, D, Roemer, F, D'hooghe, P, Guermazi, A, Posterior Ankle Impingement in Athletes: Pathogenesis, Imaging Features and Differential Diagnoses.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14001909.html