Arthroscopic excision of separated ossicles of the lateral malleolus

We have conducted a retrospective review of 19 patients for whom 20 separated ossicles of the lateral malleolus were excised arthroscopically. We examined the operating methods, findings, and overall results. The patients’ indications for this procedure were as follows. The main complaints were pain alone; ossicle sizes were small and ankle instability was minimal. There were 12 ankles of 12 males and eight ankles of seven females. The patients’ average age was 17.6years. A 2.7-mm, 30° arthroscope was inserted into the ankle joint through the anterolateral portal. Instruments were inserted through the accessory anterolateral portal, and ossicles were removed piece by piece. Talar tilt angles and anterior displacements were examined and compared before and after surgery by use of stress radiographs. Japanese Society for Surgery of the Foot (JSSF) ankle/hindfoot scales were assessed pre and postoperatively. All patients recovered their original levels of activity. The mean talar tilt angle changed from 6.1°±2.4° preoperatively to 6.0°±1.8° postoperatively (p=0.93), and the mean anterior displacement changed from 5.9±1.7mm preoperatively to 6.1±2.0mm postoperatively (p=0.42). Average JSSF ankle/hindfoot scale improved from 77.6±2.6 points preoperatively to 97.2±5.2 points postoperatively (p