Arthroscopic Scar Resection for the Treatment of Anteromedial Knee Pain after Oxford Unicompartmental Knee Arthroplasty: A Case Report

INTRODUCTION: It has been reported that the unicompartmental knee arthroplasty has good long-term outcomes for Western and Japanese patients. Alternatively, several reports have described reoperations after unicompartmental knee arthroplasty because of post-operative knee pain and sometimes it is difficult to diagnose the cause of pain. CASE REPORT: We treated a patient with anteromedial knee pain caused by intra-articular scar tissue that contained residual cement fragments on the anterior surface of a femoral implant following Oxford unicompartmental knee arthroplasty. After arthroscopic resection of the scar tissue and removal of the 3 mm residual cement covered with the scar tissue, the patient’s post-operative symptoms were considerably alleviated. CONCLUSION: This is the first report describing a case of painful intra-articular scar tissue following unicompartmental knee arthroplasty.