Discoid Medial Meniscus Tear, with a Literature Review of Treatments

The present study reports our experience of treating four cases of symptomatic discoid medial meniscus, three of which were bilateral. We performed partial meniscectomy with a four-portal technique using a knife leaving a 6 mm peripheral margin after confirmation of magnetic resonance imaging findings. Clinical results were assessed at the end of 2-year follow-up using the Knee Injury and Osteoarthritis Outcome Score and a visual analogue scale. We obtained satisfactory clinical results without recurrence of the symptoms in all cases.

A Case of Asymmetric Bilateral Discoid Medial Menisci

Discoid medial meniscus is a very rare condition of the knee. Even less frequent is the presence of bilateral medial discoid menisci and in fact only 18 cases have been described in the medical literature. We present here one case of asymmetric bilateral discoid medial meniscus. One knee had an incomplete type of discoid medial meniscus with a horizontal cleavage tear confirmed by both magnetic resonance imaging (MRI) and arthroscopy. The other knee showed a complete type of discoid medial meniscus with posterior cyst formation on MRI.

Symtomatic Discoid Medial Meniscus: Five Cases Report

Discoid medial meniscus was first reported in l930 by Watson-Jones. Discoid medial menisci are very rarely reported although the presence of discoid lateral menisci are not uncommon. From Jan. 1989 to Dec. 1994, we have experienced five cases who had discoid medial menisci with pain due to substance tear following knee injury in arthroscopy. There were three complete type anct two incomplete type. Out of flve cases, longitudinal tea1 and bucket-handle type tear were two, respectively. The remained one was a compound tear.