• Journal of the Korean Arthroscopy Society
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• v.3 no.2
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• pp.142-145
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• 1999

Chondrolysis of the femoral head s characterized by progressive destruction of the articular cartilage, resulting secondary joint space narrowing and stiffness. It is usually regarded as an idiopathic disease, but it can be produced by sequelae of an infection, trauma, or prolonged immobilization. We report a case of chondrolysis of femoral head in 45-year-old male, caused by infection and treated by arthroscopic management.

• Journal of the Korean Arthroscopy Society
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• v.4 no.1
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• pp.71-75
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• 2000

Purpose : To introduce arthroscopic partial meniscectomy fur bucket handle tear of medial meniscus using posteromedial portal, which is superior to arthroscopic partial meniscectomy using standard anterior portals commonly used. Method : After arthroscopic examination of the knee, we reduce the torn meniscus, advance the arthroscope into posteromedial compartment under arthroscopic visualization, we make posteromedial portal with reexamination of the compartment and perform arthroscopic partial meniscectomy. Conclusion : With the technique of arthroscopic partial meniscectomy using standard anterior portals, accurate partial meniscectomy can not be done because of inadequate visual field, associated meniscal injuries of posterior horn and cartilage lesion of posterior aspect of the medial femoral condyle can be missed, commonly posterior cruciate ligament can be injured and artificial damage to weight bearing surface of medial femoral condyle is possible. An arthroscopic partial meniscectomy using posteromedial portal is an excellent method fur bucket handle tear of medial meniscus.

• Journal of the Korean Arthroscopy Society
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• v.7 no.2
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• pp.215-219
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• 2003

Purpose : To report the 'condylar cut-off sign', a new radiographic sign in knees with discoid lateral meniscus and to report the sensitivity, specificity, positive predictive value and negative predictive value of the sign to elucidate the diagnostic significance of the sign for discoid meniscus. Materials and Methods : Fifty knees with complete discoid lateral meniscus and fifty normal knees formed the basis of this study. All of them were arthroscopically confirmed fer the discoid or normal lateral meniscus. The authors developed a method to measure the length of the medial and lateral condylar were compare and analyzed. Results : Tile average ratio was 0.716 in the discoid meniscus group, and 0.902 in the normal group. The stastistical analysis by the T-test revealed the t-value -11.13(p<0.0001). Stastistical analysis by chi-square test using cut point 0.8, also showed significant difference between the two groups, with $76\%$ sensitivity, $100\%$ specificity, $100\%$ positive predictive predictive value and $81\%$ negative predictive value. The 'condylar cut-off sign' was readily detectable in all cases of discoid lateral meniscus, suggesting that the cut off sign could serve as a simple and reliable radiographic sign fur the diagnosis of discoid meniscus. Conclusion : The condylar cut-off sign on the Tunnel view of simple radiography of the knee can serve as a good sign for the diagnosis of discoid lateral meniscus, with $100\%$ positive predictive value.

• Journal of the Korean Arthroscopy Society
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• v.14 no.1
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• pp.41-44
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• 2010

We have experienced a case of comparatively rare anteromedial meniscofemoral ligament (AMMFL) in which the anterior horn of the medial meniscus was attached to the posterolateral wall of the femoral intercondylar fossa. AMMFL was diagnosed and confirmed during therapeutic arthroscopy. The report suggests the need for increased awareness of the possible presence of this. Additionally, we illustrate the anomaly, discuss its controversial clinical significance and review the literature.

• Journal of the Korean Arthroscopy Society
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• v.5 no.2
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• pp.99-103
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• 2001

Purpose : The purpose of this prospective study was to evaluate second look arthroscopic finding after osteochondral autograft transfer(OAT) for the treatment of the chondral defect of the knee. Materials & Methods : Fourteen out of forty cases underwent second look arthroscopy after the OAT for the treatment of the chondral defect of the knee. The average age of patients was 34 years. Preoperatively, magnetic resonance imaging was performed in eleven cases and chondral defect was confirmed in nine cases. The site of the chondral defect located at medial femoral condyle at seven, trochlea in four, and lateral fomoral condyle in three cases. The average size of the condral defect was $13\times10mm$, maximum $22\times20mm$. The number of graft was one in eight, two in three, three in two, and five in one case. The average follow-up period was twenty-one months. Second look arthroscopy was performed at six months in almost cases. Results : After the OAT, $86\%$ of cases showed that the consistency of grafted cartilage was firm and $93\%$ of cases showed that grafted cartilage was well incorporated with surrounding cartilage. Conclusion : The results of this study suggest that OAT can be one of treatment modality in the chondral defect of the knee.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.4 no.1
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• pp.7-14
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• 2011

Purpose: The purpose of this study was to analyze the correlation between the medial joint space on weight bearing simple X-ray and the ultrasonographic articular cartilage thickness. Materials and Methods: The articular cartilage thickness of 91 osteoarthritic knees of 73 patients were measured with weight bearing simple X-ray and ultrasonography between June 2010 and September 2010. Male were 13 and female were 60. Right knees were 35, left knees were 20 and bilateral involvements were 18. Medial joint spaces on X-ray were measured in full extension view and $45^{\circ}$ PA(Rosenberg) view. Femoral cartilage thicknesses at and those at the point between the middle 1/3 and posterior 1/3 area were measured by ultrasonography, that were scanned coronally at $30^{\circ}$ flexion and $130^{\circ}$ flexion respectively. The results were analyzed statistically by Pearson correlation test and Bland-Altman plot test. Results: Medial joint spaces measured in full extension view and femoral articular cartilage thicknesses at the point between the anterior 1/3 and middle 1/3 area measured with sonography were statistically correlated and medial joint spaces measured in $45^{\circ}$ PA view and those at the point between the middle 1/3 and posterior 1/3 area measured with sonography were also correlated (P<0.05, $SD{\pm}2$). Conclusion: The measurement of articular cartilage thicknesses by the ultrasonography was easy even in the patient who are unable to take weight bearing view and was thought to be a useful diagnostic and follow up method to examine the degenerative change in addition to simple radiographic examination in the knee osteoarthritis.

• Journal of the Korean Arthroscopy Society
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• v.6 no.2
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• pp.156-160
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• 2002

Purpose : To evaluate the results and usefulness of meniscal repair using meniscal arrows with ACL reconstruction. Material and Methods : Among cases of the simultaneous meniscal arrow fixation and ACL recontruction performed between May, 1997 and September, 2000, 17 cases could be evaluated. The average follow-up were 18.5 months. Twelve cases were medial meniscus, 5 cases, lateral meniscus. All cases were longitudinal tear. Meniscal tear were seen at red-red zone in 13 cases, red-white zone in 5 cases. The results were analyzed by pain, joint line tenderness, locking, McMurray test, the Marshall knee scoring scale and complications. Results : Postoperatively two patients had mild joint line tenderness without pain on joint motion or weight bearing. No patient had locking or positive McMurray test. At last follow-up, 15 cases $(88\%)$ were 'excellent' or 'good' according to the Marshall knee score scale. There were two complications which are soft tissue irritation sign on active knee motion and a femoral chondral injury due to protruded T-shaped head of meniscus arrow. Conclusion : Meniscus arrow can be one of the options in repairing the associated meniscus tear, especially the posterior horn of medial meniscus, during ACL reconstruction. However, surgeons using meniscus arrow should be aware of its potential complications such as pain due to soft tissue irritation and chondral damage of the femoral condyle.

• Journal of the Korean Arthroscopy Society
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• v.11 no.1
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• pp.63-68
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• 2007

Purpose: The authors introduce a new technique of arthroscopic all inside repair using anterolateral and anteromedial portals for lateral meniscus root complete radial tear in patients who underwent concurrent anterior cruciate ligament (ACL) reconstruction. Operative technique: Arthroscope is placed through anteromedial portal and suture hook ($Linvatec^{TM}$, Largo, Florida, USA) is delivered through anterolateral portal. By rotating the suture hook, it penetrates posterior horn of the torn meniscus from femoral to tibial surface for vertical orientation. PDS No. 1 ($Ethicon^{TM}$, Somerville, NJ, USA) is delivered through the suture hook, and then it is withdrawn. Both end of PDS No. 1 are taken out through the anterolateral portal. MAXON 2-0 ($Syneture^{TM}$, Norwalk, Connecticut, USA) is used to penetrates remnant of tibial attachment of the torn meniscus from tibial to femoral surface in a same manner. MAXON 2-0 is changed for PDS No. 1 from tibial to femoral surface by shuttle relay technique. PDS No. 1 is tied using SMC (Samsung Medical Center) knot. Conclusion: All inside repair is a useful technique to achieve anatomical repair and to restore the hoop tension in lateral meniscus root complete radial tear.

• Journal of the Korean Arthroscopy Society
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• v.13 no.3
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• pp.259-263
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• 2009

The plica is a remnant of the synovial folds during fetal development. The plica is classified suprapatellar, medial patellar, infrapatellar, and lateral patellar plica according to the anatomic site. The one most likely cause of clinical problem is medial patellar plica. There are many reports of problems caused by medial patellar plica syndrome. But there has been no documented case report of Outerbridge classification Grade III-IV, above $2{\times}1.5\;cm$ sized huge cartilage defect of both medial femoral condyle, due to medial patellar plica. So we report this unusual case with a review of relevant literatures.

• Journal of the Korean Arthroscopy Society
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• v.11 no.1
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• pp.45-49
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• 2007

We report a case of a girl with a symptomatic anomaly of medial meniscus. The complaint of the patient was pain and snapping of the knee. The anterior horn of medial meniscus has anomalous insertion which was extended to the intercondylar notch of the femur on the surface of the anterior cruciate ligament, it attached to lateral wall of medial femoral condyle. This anomalous band was not detected in MRI of knee but found during the operation. After resection of anomalous band, the symptoms completely disappeared.