Discoid lateral meniscus has been described as a morphologically variable anomaly, and several classifications have been proposed. We have seen 12 patients with the so-called complete type of discoid lateral meniscus, with intact ligament attachments as an incidental finding at the time of arthroscopy. 10 of the 12 patients were without significant symptoms attributable to the meniscus; that is, they had no meniscal tears or laxity. We also have seen 6 patients with the Wrisberg-ligament type of discoid lateral meniscus, in which there is abnormal meniscal mobility. All 6 patients were symptomatic and had the so-called snapping-knee syndrome, for which they had arthroscopic lateral meniscectomy. During arthroscopy, care should be taken not to confuse the asymptomatic complete type of discoid lateral meniscus with the Wrisberg-ligament type.
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Discoid lateral meniscus has been described as a morphologically variable anomaly, and several classifications have been proposed. We have seen 12 patients with the so-called complete type of discoid lateral meniscus, with intact ligament attachments as an incidental finding at the time of arthroscopy. 10 of the 12 patients were without significant symptoms attributable to the meniscus; that is, they had no meniscal tears or laxity. We also have seen 6 patients with the Wrisberg-ligament type of discoid lateral meniscus, in which there is abnormal meniscal mobility. All 6 patients were symptomatic and had the so-called snapping-knee syndrome, for which they had arthroscopic lateral meniscectomy. During arthroscopy, care should be taken not to confuse the asymptomatic complete type of discoid lateral meniscus with the Wrisberg-ligament type.
Copyright remains with the authors and publisher.