Presentation
Recurrent ankle twist and pain. Referred for an ultrasound of lateral ankle ligaments.
Patient Data
Age: 40 years
Gender: Female
From the case:
Vacuum phenomenon in ankle joint
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There is normal thickness, fibrillary echopattern of the anterior talofibular ligament. There are echogenic line / tiny echogenic foci under the anterior talofibular ligament. These foci change position with ankle movements.
Case Discussion
The case shows a normal anterior talofibular ligament between lateral malleolus and talus. There is air in the ankle joint under the ligament which a normal finding.