• Clinics in Shoulder and Elbow
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• v.18 no.4
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• pp.211-216
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• 2015

Background: Few studies have investigated magnetic resonance (MR) characteristics of traumatic posterosuperior rotator cuff tears involving the supraspinatus and infraspinatus. We hypothesized that traumatic rotator cuff tears may have MR characteristics distinguishable from those of non-traumatic tears. Methods: Preoperative MR arthrography and intraoperative tear size measurements were compared in 302 patients who underwent MR arthrography and subsequent arthroscopic rotator cuff repairs for traumatic (group T, 61 patients) or non-traumatic (group NT, 241 patients) tears. The inclusion criteria for both groups were posterosuperior full-thickness rotator cuff tear and age between 40 and 60 years. For group T, traumas were limited to accidental falls or slips, or sports injuries, motor vehicle accidents; injuries were associated with acute onset of pain followed by functional shoulder impairment; and time between injury and magnetic resonance imaging (MRI) was 6 weeks or less. Results: In group T, 72.1% of shoulders (44 patients) had tendon tears with blunt edges while 27.9% of shoulders (17 patients) had tears with tapering edges. In contrast, 21.2% of patients in group NT (51 patients) had blunt-edge tears, while 78.8% (190 patients) of tears had tapering edges. These results were statistically significant (p<0.001) and estimated odds ratio was 9.6. The size of tear did not vary significantly between groups. Conclusions: We found no exclusive MR characteristic to define traumatic tears. However, oblique coronal MRI of traumatic tears showed a significant tendency for abrupt and rough torn tendon edges and relatively consistent tendon thicknesses (without lateral tapering) compared to non-traumatic cuff tears.

• Journal of Korean Foot and Ankle Society
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• v.11 no.2
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• pp.198-203
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• 2007

Purpose: To assess the arthroscopic findings in chronic lateral ankle instability and to evaluate the results of modified $Brostr{\ddot{o}}m$ operation and arthroscopic procedures. Materials and Methods: Twenty-nine cases with chronic lateral ankle instability were treated with modified $Brostr{\ddot{o}}m$ operation and ankle arthroscopy from May 2004 to January 2007. There were 19 male and 10 female with the mean age of 29.7 years. Mean follow up period was 15.8 months. All patients were checked preoperative stress anterior drawer and varus test with X-ray. Results: Associated injuries were 28 fat impingement projected into the joint between distal tibio-fibular space, 20 anterior impingement of soft tissue, 19 osteochondral defects and 13 loose body. Preoperative AOFAS score of pain, function and alignment were 28.9, 34.1 and 7.9 each other. They were improved into 38.7, 40.8 and 9.8 postoperatively. Conclusions: Modified $Brostr{\ddot{o}}m$ operation with ankle arthroscopy for chronic lateral ankle instability is believed to be a reliable option to obtain satisfactory results. Careful attention to the associated injuries such as distal fat impingement, anterior impingement, osteochondral defect and loose body is needed during the arthroscopy.

• Journal of the Korean Arthroscopy Society
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• v.13 no.3
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• pp.264-267
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• 2009

Pigmented villonodular synovitis (PVNS) is a benign proliferative disorder of the synovium of joints. It occurs most commonly in the knee joint. The disease is composed of 2 different forms: diffuse and localized. The localized form is less frequent than the diffuse one. Most cases of localized PVNS involve the anterior compartment of the knee and can be usually easily diagnosed and treated with arthroscopy. We experienced a patient of localized PVNS developed on the posterior cruciate ligament, whose main symptom was persistent pain after trauma. This case occurs rarely and complete removal of the lesion was performed arthroscopically, using posterior trans-septal portal. We report this case with review of literatures.

• Journal of the Korean Arthroscopy Society
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• v.14 no.3
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• pp.188-191
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• 2010

Absence of long head of biceps tendon is a very rare anomaly. We encountered a 19 year-old male patient who had right shoulder subluxation. On magnetic resonance imaging, shallow intertubercular groove on right humerus was observed, and absence of long head of biceps tendon was discovered. Arthroscopically, labral rupture and absence of long head of biceps tendon were also evident. Left shoulder had a similar symptom as right 5 months after the initial development of the symptom on the right shoulder. Both MRI and arthroscopy revealed absence of long head of biceps tendon and labral ruptre. Arthroscopic labral repair was performed for both shoulders, and, postoperatively, they were fixated with abduction brace. In this case, it is considered that the absence of long head of biceps tendon triggered the instability of shoulder found in our patient.

• Journal of the Korean Arthroscopy Society
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• v.10 no.1
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• pp.87-90
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• 2006

The complication caused by a bioabsorbable interference screw is rare after anterior cruciate ligament reconstruction. We report a case of delayed inflammatory reaction at the tibial tunnel and femoral tunnel where the graft tendon had been fixed with a bioabsorbable interference screw ($Bioscrew^{(R)}$) for anterior cruciate ligament reconstruction using bone-patellar tendon-bone autograft.

• Journal of the Korean Arthroscopy Society
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• v.9 no.2
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• pp.109-114
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• 2005

Recently, the interest on anatomical ACL reconstruction with double bundle technique is increased to reproduce the original load distribution, and kinematics of the knee. We developed an arthroscopic double bundle ACL reconstruction technique using autogenous quadriceps tendon with 2 splitted graft and patellar bone plug. The anteromedial bundle and posteolateral bundle of the ACL is replicated with each splitted graft of quadriceps tendon and fixed with biodegradable interference screw on the 2 femoral tunnels. The patellar bone plug of quadriceps tendon is fixed with biodegradable interference screw within the 1 tibial tunnel. We suggest that our technique using quadriceps tendon may be an alternative in arthroscopic double bundle ACL reconstruction.

• Journal of the Korean Arthroscopy Society
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• v.6 no.2
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• pp.188-191
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• 2002

The complication caused by a bioabsorbable interference screw composed of Poly-L-Lactic-Acid is rare after anterior cruciate ligament (ACL) reconstruction. We reported a case of a pretibial ganglion at the orifice of the tibial tunnel where the graft tendon had been fixed with a bioabsorbable interference screw $(Bioscrew^{\circledR})$ for ACL reconstruction using autogenous hamstring tendon. The patient was underwent ganglion excision and interference screw removal.

• Journal of the Korean Arthroscopy Society
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• v.2 no.1
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• pp.97-100
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• 1998

The giant cell tumor of tendon sheath is very rarely present inside the knee joint. The authors report a case of intraarticular giant cell tumor of tendon sheath arising from posterior cruciate ligament which was successfully excised arthroscopically using posterior trans-septal portal at the time of arthroscopic reconstruction of anterior cruciate ligament.

• Journal of the Korean Arthroscopy Society
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• v.17 no.1
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• pp.56-60
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• 2013

Calcific tendinitis of rotator cuff is a common disease which could be the cause of shoulder pain, and frequently occurs in supraspinatus, infraspinatus and teres minor in descending order. Calcific tendinitis of subscapularis is rare and arthroscopic treatment of that has also been rarely reported. So, we report a case of arthroscopic treatment of calcific tendinitis of subscapularis with excellent result.

• Clinics in Shoulder and Elbow
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• v.4 no.1
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• pp.30-34
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• 2001

Synovial chondromatosis is a rare disease. The knee is the most commonly affected joint but the shoulder joint is very rarely affected. We report typical synovial chondromatosis of the shoulder joint which was managed by arthroscopic removal of multiple loose bodies, synovectomy, good objective and functional outcome was obtained until postoperative 7-year follow-up. Arthroscopy can be used as an effective and useful therapeutic method for synovial chondromatosis of the shoulder joint.