• Investigative Magnetic Resonance Imaging
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• v.20 no.3
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• pp.191-195
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• 2016

Among the various types of congenital meniscal anomalies, the double-layered lateral meniscus is extremely rare. The double-layered meniscus consists of both the upper additional and the lower normal meniscus. As the upper additional meniscus is mobile, it can be easily displaced, while the lower lateral meniscus is usually normal in shape and volume. A 42-year-old woman suffering from pain and locking of her left knee underwent Magnetic resonance imaging (MRI) examination and an arthroscopic surgery. A rare meniscal abnormality was seen in her left knee, which presented as a double-layered lateral meniscus with displacement. It was remarkable that the upper additional meniscus was displaced over the intercondylar eminence of the tibia and it mimicked a bucket-handle tear. Even though it is rare, it is necessary to consider the possibility of displaced double-layered meniscus in the differential diagnosis of a bucket-handle tear. Here, we report the MRI and arthroscopic findings of a displaced double-layered lateral meniscus, which was similar to the bucket-handle tear.

• Journal of the Korean Arthroscopy Society
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• v.7 no.2
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• pp.153-159
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• 2003

Purpose : The purpose of this study was to compare the pattern of displaced bucket-handle tear of lateral and medial menisci and the treatment modality and results from accompanying injury. Materials and Methods : Patients who were diagnosed for displaced bucket-handle tear of medial meniscus (group I: 52patients, 52cases) and lateral meniscus (group II: 31patients, 32cases) from September 1998 to December 2002. The mean ages were 25years $(16\~66)$ for Group I and 29years $(18\~63)$ for Group II, and the average follow-up period were 18months $(12\~44)$ and 13months $(6\~46)$, respectively. The zone of meniscus tear and the existence of accompanying injury were verified through intraoperative arthroscopy and discoid type meniscus was additionally examined for group II. The assessment was made according to the physical examination and clinical pattern at the postoperative last follow-up, and the 2nd look arthroscopy was performed in 19cases $(23\%)$ for the cases accompanying anterior cruciate ligament (ACL) injury in both groups. Results : There were 38cases $(73\%)$ in group I, 5cases $(16\%)$ in group II for associating ACL injury. We observed discoid type meniscus (19cases, $59\%$) in group II. At last follow-up clinical success in repair cases of group I and II are 22cases $(85\%)$, 2cases $(67\%)$, in resection cases are 26cases $(100\%)$, 26cases $(93\%)$ respectively. Reoperation is performed 2cases in repair cases of group I. One case is re-rupture, the other case is newly developed tear in white-white zone. Reoperation is performed 2cases due to remnant meniscal tear in resection cases of group II. All of 2cases are discoid type menisci. Conclusion : Displaced bucket-handle tear of medial & lateral menisci would be substantially different an aspect, considering on difference would help to select proper treatment modality.

• Journal of the Korean Arthroscopy Society
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• v.6 no.2
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• pp.142-149
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• 2002

Purpose : The purpose of this study is to compare with result of repair and resection in displaced bucket handle medial meniscal tear. Materials and Methods : From Sep. 1998 to Dec. 2001, we experienced 46 cases, 45 patients. We classified them into repair group (group I, 23 cases) and resection group (group II, 23 cases). We analyzed the time interval between injury and operation, zone of tear, the status of reduction and quality of displaced fragment of all cases. Average follow-up period is 29, 28 months, respectively. We evaluated the final results of both groups as Lysholm knee score, radiologic changes and 2nd look arthroscopy. Results : Mean age was 25 years old in both group, respectively. Mean interval between injury and surgical treatment was 12 and 17 weeks. respectively. In group I, 6 of 7 cases were evaluated as clinical success in red-red zone, 12 of 15 cases were assessed as clinical success in red-white zonal tear, stable reduction. Another case which is evaluated as clinical failure showed red-white zonal tear, unstable reduction and poor quality meniscal fragment. 5 cases showed variant degrees of tibio-femoral compartment symptom. In group II, red-white zone (9 cases) and white-white zone (14 cases) were treated as resection and got good results. Conclusion : Considering zone of tear, reducibility and quality of meniscal fragment before treatment will improve the success rate of meniscal repair.