• Journal of the Korean Arthroscopy Society
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• v.15 no.2
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• pp.146-154
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• 2011

Injury of posterolateral corner is unusual, but it can cause disability due to severe instability and cartilage damage. However, the anatomical structures, diagnosis and treatment have not defined clearly yet. Posterolateral corner injury is regarded as the one of main factor to the results of failure in cruciate ligament reconstcution if it was undiagnosed and untreated. Diagnosis of postetolateral corner injury is consists of physical exam, radiographic finding, MRI, and arthroscopic findings. The treatment method of of postetolateral corner injury depends on the time and severity of injury. Anatomical reconstruction of posterolateral corner shows the better clinical outcome than non anatomical reconstructions, but the clinical results of long term follow up is still needed. Therefore, the aim of this article is to review the recent literatures and to organize diagnosis and treatment of posterolateral corner injury.

• Journal of the Korean Arthroscopy Society
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• v.14 no.2
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• pp.128-130
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• 2010

Femoral avulsion fracture of posterior cruciate ligament (PCL) is rare, especially in adult. We experienced a case of femoral bony avulsion fracture of PCL. The patient was seventy one year old man with limitation of motion in the knee joint due to previous trauma and he was injured by fall down from 2 m height. We took CT scan and MRI study. We treated with arthroscopic repair technique using transfemoral two wire sutures. Second look arthroscopy was done for removal of the wires at postoperative one year.

• Journal of Science and Technology Studies
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• v.13 no.1
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• pp.1-39
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• 2013

How would technoscientists collaborate in their technoscientific practices? Based on the ethnographic research done at NRI(Neuroscience Research Institute), this research shows how collaboration occurs in/outside the interdisciplinary laboratory. As previous studies show, collaboration makes researches possible that otherwise would have been impossible. Korean technoscientists who are situated in the scientific periphery, practice contextualized collaboration in their labs. These collaborations are invisible before opening the black box of the lab. But it acquires visibility after certain incidents such as collaborations, debates and discussions, malfunctioning of the instruments, and networking with other actors occur. These networks again become invisible after the certain incidents end. However these blackboxing and whiteboxing (opening the blackbox) processes occur simultaneously in various levels, it is almost impossible to identify them separately. In real technoscientific practices, blackboxing and whiteboxing do not occur distinctively. They almost always occur at the same time on multi-layered levels, hence forming the 'grey box' of technoscientific practices. Lastly, collaborations inside laboratory have in/visible features, because laboratories function as Foucauldian heterotopias.

• The Journal of the Korean bone and joint tumor society
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• v.11 no.1
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• pp.105-109
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• 2005

This journal reports three cases diagnosed with schwannomatosis in which no clinical symptoms of type 2 neurofibromatosis. The chief complain was pain. In adolescence and adult group, all masses were found. The locations were brachial plexus, popliteal fossa and hand. No hearing impairment, vertigo, tinnitus and visual disturbance was observed in any of the case. Family history was negative. In all cases, there was no evidence of vestibular schwannoma on cranial MRI imaging study. In all cases, Tinel sign was positive. Pathologic diagnosis was positive for schwannoma. Further study and case collection is needed to idenity the clinical manifestation, clinical course and genetic characteristic of schwannomatosis.

• Journal of the Korean Arthroscopy Society
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• v.13 no.1
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• pp.77-81
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• 2009

In patients with full-thickness tears of the rotator cuff, the tendon is usually detached from its bony insertion in the greater or lesser tuberosity. We experienced an unusual pattern of rotator cuff tear in two cases, in which complete rotator cuff tears occurred at the tendinous portion (i.e., intrasubstance tears) with more than a 1cm remnant attached to the greater tuberosity. Arthroscopic tendon-totendon repair was performed without remnant removal in both cases. Follow-up MRI at 6 months showed re-tear of the rotator cuff at the previous tear site in both of our patients. To prove the availability of arthroscopic tendon-to-tendon repair in such cases, a larger case follw-up and biomechanical studies are required.

• 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.

• Progress in Medical Physics
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• v.18 no.4
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• pp.214-220
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• 2007

Diffusion tensor tractorgraphy which is based on line propagation method with brute force approach is implemented and the vector correlation function is proposed in addition to the conventional fractional anisotrophy value as a criterion to select seed points. For the whole tractography, the proposed method used 41 % less seed points than the conventional brute force approach for $FA{\geq}0.3$ and most of the fiber tracks in the outer region of white matter were removed. For the corticospinal tract passing through region of interest, the proposed method has produced similar results with 50% less seed points than conventional one.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.40 no.4
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• pp.221-226
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• 2016

Since arterial disease in the upper extremity is less common than that in the lower extremity, experimental and numerical investigations related to upper extremity have been rarely performed. We created a three-dimensional model of the arteries, larger than approximately 1 mm, in a Korean adult's left hand (from brachial to digital arteries), from 3T magnetic resonance imaging (MRI) data. For the first time, a three-dimensional computational fluid dynamic method was employed to investigate blood flow velocity, blood pressure variation, and wall shear stress (WSS) on this complicated artery system. Investigations were done on physiological blood flows near the branches of radial and deep palmar arch arteries, and ulnar and superficial palmar arch arteries. The flow is assumed to be laminar and the fluid is assumed to be Newtonian, with density and viscosity properties of plasma.

• The Korean Journal of Pain
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• v.7 no.2
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• pp.287-291
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• 1994

A 49 years old male patient was admitted to our neuro-pain clinic with symptoms of left 11th intercostal neuralgic pain and low back pain that developed 2 months prior to admission. Upon initial physical examination, motor weakness or sensory deficit were absent. Intercostal neuralgic pain improved significantly after we performed thoracic root thermocoagulation. However on the afternoon of the procedure the patient started to experience voiding difficulty, saddle anesthesia and rapidly progressing motor weakness and hypoesthesia that involved the lower back area and the lower extremities for three days. Based on these symptoms spinal cord compression was suspected and subsequently plain T-L spine X-rays and T-L spine MRI were performed. A spinal tumor that appeared metastatic in origin was seen at the T11 and T12 level. Liver ultrasonography demonstrated the presence of a $4{\times}4cm$ sized ill defined mass in the posterior segment of the right lobe. The patient was diagnosed to have hepatocellular carcinoma after needle aspiration biopsy and cytologic studies. Further orthopedic surgery was recommended but as the patient rejected any further treatment and examination, it was not possible to confirm the primary focus of the tumor. However as metastasis of a primary liver tumor to the spine is a rare occurrence, some other primary focus of metastasis or even a malignant primary tumor of the spine is more likely to explain this patient's condition.

• Clinics in Shoulder and Elbow
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• v.14 no.1
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• pp.84-88
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• 2011

Purpose: We report here on two cases of calcific tendinitis at the origin of the common extensor tendons of the forearm. Materials and Methods: A 42 year-old female complained of left elbow pain and flexion contracture. After obtaining the simple radiographs and MRI, surgical excision of the calcific deposits was done under the diagnosis of calcific tendinitis. A 25 year-old female complained of right elbow pain and a limited range of motion. Simple radiographs showed a calcific deposit just distal to the lateral epicondyle, and then she was managed with extracorporeal shock wave therapy. Results: The pain disappeared completely and both patients regained a full range of motion after treatments. Conclusion: Calcific tendinitis at the origin of the common extensor tendons of the forearm should be included in the differential diagnosis of the lateral elbow diseases that cause pain and a limited range of motion.