Sixty ankle arthroscopies were performed on patients with chronic soft
-tissue impingement of the ankle after an ankle sprain between January
1989 and January 1994. Preoperative examination findings featured ten
derness localized to the anterolateral aspect of the ankle, no instabi
lity, and, with the exception of 2 patients, normal radiographs. A pre
operative bone scan was performed on 34 patients and was positive in e
ach case but was not specific. Arthroscopy was performed an average of
23 months after injury. Results were determined by using a new ankle
rating score. Hypertrophic synovium, synovitis, or fibrous adhesions w
ere arthroscopically visualized and resected in all cases. The average
follow-up was 27 months (range, 6 to 64 months). Thirty-one patients
underwent complete evaluation and 29 were evaluated over the telephone
. There were 51 excellent, 7 good, 1 fair, and 1 poor results. The dia
gnosis of chronic soft-tissue impingement of the ankle can be made fro
m an appropriate history, thorough physical examination, and plain rad
iographs. Ankle arthroscopy with resection of impinging hypertrophic s
ynovium or fibrous bands occurring after an ankle sprain was effective
in alleviating pain in athletes.