Rupture of the Achilles tendon (TA) is a common injury. Nevertheless, there is significant potential for missing the diagnosis on initial presentation. We investigated the potential role of lateral ankle X-ray studies in aiding diagnosis.
To determine the potential role of radiographs of the ankle in assisting in the diagnosis of Achilles tendon ruptures.
In a regional trauma unit, 27 patients with confirmed TA rupture at operation had the “tibio-first metatarsal angle” measured as an indication of ankle neutrality. A neutral ankle was defined as an angle of≤100°. Twenty-seven patients with intact TA were used as controls.
The mean angle in the TA rupture group was 88° (range 70–120°) and 125° (104–146°) in the control group (p <0.001).
In cases of TA rupture, the ankle adopts a more dorsiflexed position than in the ankle with an intact TA. We believe that an ankle joint adopting a neutral position on a lateral X-ray study of the ankle provides a clue to help reduce the rate of missed TA ruptures at initial presentation.
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Published online: June 28, 2010
Accepted: May 11, 2010
Received in revised form: February 21, 2010
Received: September 25, 2009
© 2011 Elsevier Inc. Published by Elsevier Inc. All rights reserved.