A 22-year-old football punter complained of anterior knee pain deep to his patellar tendon that occurred every time the knee of his kicking leg reached full extension during a punt. Arthroscopy confirmed anterior impingement between a fibrous tissue eminence directly anterior to his anterior cruciate ligament (ACL) and the intercondylar roof in full extension. With the eminence removed, full extension no longer caused impingement as demonstrated arthroscopically. He resumed punting at maximal effort 6 weeks postoperatively without pain. We report the active–passive knee extension test, a physical examination maneuver designed to identify patients with anterior knee impingement between tissue anterior to the ACL and the intercondylar roof. This test is a helpful part of the clinical examination in detecting these lesions.
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*Division of Orthopaedic Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada; and
†OSU Sports Medicine Center, The Ohio State University, Columbus, Ohio.
Corresponding Author: Christopher C. Kaeding, MD, OSU Sports Medicine, The Ohio State University, Suite 3100, 2050 Kenny Rd, Columbus, OH 43221 (firstname.lastname@example.org).
The authors report no conflicts of interest.
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Received February 08, 2016
Accepted August 03, 2016