Michelle Rosemberg MD, Presenter: Nothing to Disclose

Adriana Maria De Lima Oliveira MD, Abstract Co-Author: Nothing to Disclose

Hamilton Guidorizzi MD, Abstract Co-Author: Nothing to Disclose

Andre Yui Aihara MD, Abstract Co-Author: Nothing to Disclose

Carlos Henrique Longo MD, Abstract Co-Author: Nothing to Disclose

Enio Rubens Silva E Silva MD, Abstract Co-Author: Nothing to Disclose

Chopart joint sprains are infrequent and easely overlooked. The aim of this exhibit is to show direct and indirect findings that can alert radiologists about Chopart lesions.  

- anatomy review - trauma mechanism - frequently found sentinel lesions: extensor digitorum brevis muscle stretch, bifurcate ligament rupture/sprain, avulsive fractures of calcaneus anterior process and upper part of navicular bone, talonavicular capsule-ligamentous complex rupture/sprain

Although ankle torsions are frequently diagnosed, midfoot sprains, particularly involving Chopart joint, are commonly overlooked mostly because radiologist attention is focused to ligamentary lesions of the hindfoot. Our aim in this exhibit is to describe sentinels lesions that are potential indicators of Chopart sprains. Those lesions are frequently found after eversion trauma and may be related to car accidents and sports practice. The trauma mechanism is related to energy dissipation, and it usually involves extensor digitorum brevis muscle, bifurcate ligament, avulsive fractures of calcaneus anterior process, as well as upper part of navicular bone, related to talonavicular capsule-ligamentous complex. High energy traumas may develop worse lesions that can culminate with Chopart joint laxation in the final stage.  

Rosemberg, M, Oliveira, A, Guidorizzi, H, Aihara, A, Longo, C, Silva E Silva, E, Chopart Sprains: Sentinel Signs That Avoid Overlooking.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/13022471.html