Yang Q, et al. - Authors ascertained the functional and radiological outcomes of arthroscopic treatment of anterior ankle impingement (AAI) in patients with chronic lateral ankle instability (CAI). A significant postoperative improvement was seen in the functional outcome scores and dorsiflexion. In patients with CAI accompanied by anterior ankle impingement symptom, satisfactory surgical outcomes were produced by combined treatment of chronic ankle instability and anterior ankle impingement.