ANOMALOUS INSERTION OF THE MEDIAL MENISCI

Many types of meniscal anomalies have been reported. The authors encou ntered two cases of anomalous insertion of the anterior horn of the me dial menisci to the lateral femoral condyle, which ran up along the co urse of the anterior cruciate ligament (ACL), but was independent of t he ACL. These anomalies were noted during arthroscopic examination and surgery of the ipsilateral knee for a torn discoid meniscus and a pat ellar fracture. A 34-year-old woman had a horizontal tear of the later al discoid meniscus. We performed arthroscopic partial meniscectomy of the inner torn portion of the lateral discoid meniscus and contoured it to resemble a normal meniscus. An anomalous insertion of the medial meniscus was found on examination of the joint during surgery. A 32-y ear-old man had a patellar fracture and we performed reduction under a rthroscopy and internal fixation with cannulated screws. The same anom alous insertion of the medial meniscus was also found on examination o f the joint during surgery. We report the cases with a review of the l iterature.