• 대한영상의학회지
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• 제83권5호
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• pp.1003-1013
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• 2022

담도폐쇄증은 원인은 알 수 없으나 간외 담도의 섬유화로 내강이 막히면서 간문부에 '섬유성 담도잔유물'의 형태로 남아있는 질환이다. 'Triangular cord' (이하 TC) sign은 간문부에 남아있는 섬유성 담도잔여물을 초음파 검사에서 나타내는 소견이다. 본 종설에서는 담도폐쇄증의 수술 및 초음파 소견의 비교, TC sign의 정의, 객관적인 진단기준, 진단의 정확도 및 감별진단에 대하여 기술하고자 한다.

• Journal of Korean Neurosurgical Society
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• 제58권5호
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• pp.476-478
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• 2015

Isolated cortical vein thrombosis (ICVT) is a rare disease, accounting for less than 1% of strokes. A 46-year-old woman presented with progressive left side weakness. Magnetic resonance (MR) imaging with $T2^*$-gradient echo ($T2^*$-GE) sequence showed long cord sign at the right frontal cortex. The patient was treated with low molecular weight heparin, followed by oral warfarin for 6 months. The 3-month follow-up MR imaging showed recanalization of the previously thrombosed cortical vein. She was completely recovered without neurological deficits after 6 months. This provides that MR imaging with $T2^*$-GE sequence can help to diagnosis the ICVT and outcomes of the ICVT are generally favorable.

• Advances in pediatric surgery
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• 제6권1호
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• pp.19-26
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• 2000

This paper reports our 9-year experience treating 34 infants with biliary atresia utilizing a new non-invasive diagnostic method, ultrasonographic "triangular cord"(TC) sign. The TC sign is present when there is visualization of a triangular or a band-like echogenicity just cranial to the portal vein. The ultrasonographic TC sign appears to be a simple, non-invasive, time-saving and useful tool in the diagnosis of biliary atresia. Sensitivity is 84 %. Active bile excretion was restored in 90 % of the patients who were treated between 31-60days, 78 % of those between 61-90 days, and 33 % of those being 91days or older. The incidence of postoperative cholangitis was 36 %. Construction of an antireflux valve in the Roux-en-Y loop did not affect the incidence of postoperative cholangitis(p=0.18). Among 34 infants with biliary atresia, 23(68 %) are alive for 2-102 months after operation, and 12 are alive for more than 5 years. Five-year estimate survival by Kaplan-Meier method was 66 %.

• 대한후두음성언어의학회지
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• 제6권1호
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• pp.27-38
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• 1995

It is well known that unilateral vocal cord paralysis is a sign of a disease and not a disease entity. In an attempt to evalute incidence of unilateral vocal cord paralysis related to varoius causes and to analyze our treatment results, the records of 210 patients seen at the Department of Otorhinolaryngology, Yongdong Severance Hospital during the 10-year period from March 1985 to March 1995 were reviewed. Fifty-three patients(25.2%) of the 210 patients with unilateral vocal cord paralysis had surgery-related causes, and intubations including tracheostomy was the most common etilogy among them. One hundred and fifty seven cases(74.8%) was not related to surgery and, among these most common cause was idiopathic. Spontaneous recovery took place in 17(8%) patients. Phonosurgery including type Ⅰ thyroplasty(n=16) and arytenoid adduction(n=10) and combination of them(n=3) yielded good results except intrafold teflon injection(n=4). These results of our series were compared to other series reported over the past decades.

• Investigative Magnetic Resonance Imaging
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• 제23권3호
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• pp.279-282
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• 2019

Neurosyphilis is an infection of the brain or spinal cord that is caused by the bacterium Treponema pallidum. Syphilitic myelitis, which involves the spinal cord, is a very rare form of neurosyphilis seen in patients with syphilis. It requires differentiation from other diseases of the spinal cord, including idiopathic transverse myelitis and spinal cord infarction. Herein, we describe the presentation and diagnosis of syphilitic myelitis in a 43-year-old woman, based on a flip-flop sign and candle guttering appearance depicted in magnetic resonance imaging and laboratory tests.

• Journal of Medicine and Life Science
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• 제19권3호
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• pp.130-133
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• 2022

Several studies have reported a possible link between anti-aquaporin-4 antibody and vitamin B12 deficiency in neuromyelitis optica spectrum disorder (NMOSD). Bilaterally symmetric hyperintense signals on magnetic resonance imaging (MRI) of the posterior columns, called the inverted V sign, are a characteristic feature of subacute combined degeneration associated with vitamin B12 deficiency. We report a patient with anti-aquaporin-4 antibody-positive NMOSD and an inverted V sign on MRI of the spinal cord and address the association between anti-aquaporin-4 antibody and functional vitamin B12 deficiency.

• Journal of Korean Neurosurgical Society
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• 제53권2호
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• pp.121-124
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• 2013

Granular cell tumors (GrCTs) of the spinal cord are rare benign tumors with a high rate of local recurrence. Only 6 cases of spinal GrCTs have been reported. GrCT is difficult to distinguish from other benign tumors such as schwannoma using imaging. A radiological "speckled dots" sign may be a useful differentiating feature of GrCT based upon experience with two cases and a review of the literature.

• Annals of Clinical Neurophysiology
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• 제15권2호
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• pp.68-70
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• 2013

Atopic myelitis (AM) is a relatively mild form of myelitis associated with allergic diathesis, and present with predominant sensory manifestations. Lhermitte's sign has been considered as a relatively non-specific clinical sign suggesting demyelinating lesion in cervical cord. Here we report a patient with recurrent AM who presented with isolated Lhermitte's sign, both in first and second attacks. This report suggests that either the diagnosis or recurrence of AM can be frequently underdiagnosed because of its predominant sensory manifestations.

• 대한근전도전기진단의학회지
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• 제20권2호
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• pp.119-123
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• 2018

A 14-year-old student presented with a 2-year history of progressive left foot deformity. High elevated medial arch, hindfoot varus deformity and second to fourth claw toes were idenfied in the left foot without a familial history. Neurologic examinations showed left distal lower extremity weakness and bilateral increased deep tendon reflexes. MRI of whole spine demonstrated thickened filum terminale and spinal defect covered with pulled skin which findings consistent with tethered cord syndrome (TCS). He was referred to neurosurgery department and had a detethering operation of the spinal cord. Two years later, he underwent foot surgery because his foot deformity progressed despite the detethering operation. It is very rare for TCS to present with pes cavus as the only symptom, also in Korea. We suggest that TCS should be considered as one of the differential diagnoses associated with unilateral pes cavus in adolescence so as not to miss the proper period of surgery.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.57.2-57.2
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• 2011

In this study, the effects of shear flows around a 2-dimensional airfoil, S809 on its aerodynamic characteristics were analyzed by CFD simulations. Various parameters including reference inflow velocity, shear rate, angle of attack, and cord length of the airfoil were examined. From the simulation results, several important characteristics were found. Shear rate in a flow makes some changes in the lift coefficient depending on its sign and magnitude but angle of attack does not have a distinguishable influence. Cord length and reference inflow also cause proportional and inversely proportional changes in lift coefficient, respectively. We adopted an analytic expression for the lift coefficient from the thin airfoil theory and proposed a modified form applicable to the traditional load analysis procedure based on the blade element momentum theory. Some preliminary results applied to an well known load simulation software, FAST, are presented.