• Kevin Martin, Jeffrey Wake, and J Preston Van Buren.
• Evans Army Community Hospital, 650 Cochrane Cir, Fort Carson, CO 80913.
• Mil Med. 2020 Jan 7; 185 (Suppl 1): 420-422.

IntroductionThe purpose of this study was to identify the location of the peroneal tendons in relationship to the fibular groove in an asymptomatic population of elite U.S. Military Service members.Materials And MethodsThe peroneal tendons of 41 active duty U.S. Army Rangers were examined. Subjects were placed in a lateral recumbent position with the ankle in a resting neutral position to visualize the tendon in a retromalleolar short-axis view. Maximum active ankle eversion followed by gravity inversion was facilitated while the ultrasound probe was maintained in its original position. Distance from the fibrous lateral ridge of the retromalleolar groove to the anterior aspect of the peroneal brevis was measured in the short axis in neutral, eversion, and inversion.ResultsThe mean sagittal distance and standard deviation was 0.48 ± 0.9 mm. No subjects demonstrated greater than 1 mm difference between positions, and no dislocations were identified. Side-to-side difference and dominant vs nondominant differences were not statistically significant.ConclusionThe study demonstrates that the distance between the peroneal brevis and the lateral fibular ridge is consistent throughout extremes of motion. These results further the understanding of peroneal tendon function under dynamic examination. Our findings also establish side-to-side consistency prompting a bilateral examination to help identify abnormal pathology.© The Author 2020. Published by Oxford University Press Association of Military Surgeons of the United States. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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