1.Pityriasis Versicolor Atrophicans.
Jong Hyuk MOON ; Min Ji KANG ; Chan Yl BANG ; Bo Hee YANG ; Ji Won BYUN ; Jeonghyun SHIN ; Gwang Seong CHOI
Korean Journal of Dermatology 2014;52(1):68-70
No abstract available.
Atrophy
;
Pityriasis*
;
Tinea Versicolor*
2.Surgical Management of Congenital Tracheal Stenosis.
Journal of the Korean Pediatric Cardiology Society 2004;8(1):52-58
No Abstract available.
Tracheal Stenosis*
3.Effect of Combined Sex Hormone Replacement on Bone/Cartilage Turnover in a Murine Model of Osteoarthritis.
Jae Hyuk YANG ; Ji Hun KIM ; Deuk Soo LIM ; Kwang Jun OH
Clinics in Orthopedic Surgery 2012;4(3):234-241
BACKGROUND: Estrogens act on estrogen receptors distributed in articular cartilages, synovial membrane, and ligaments, which are thought to be related with degenerative changes. Meanwhile, progesterone is known to have a weak anabolic action on bone formation This study evaluates the effects of estrogen and progesterone hormone on bone/cartilage turnover in ovariectomized (OVX) rats. METHODS: Thirty-five 7-month-old female Sprague-Dawley rats were randomly divided into 5 groups and then ovariectomized bilaterally except the sham control group. The first and the second group acting as controls did not receive hormonal therapy, the third group received estrogen, the fourth group received progesterone, and the fifth group received combination of both hormones 10 weeks after surgery. Evaluations were done using the serum levels of cartilage oligomeric matrix protein (COMP) for cartilage turnover, collagen type I C-telopeptide (CTX-1) and osteocalcin (OC) for bone turnover at 11, 15, 19 weeks after OVX and histology using the Osteoarthritis Research Society International (OARSI) osteoarthritis (OA) cartilage histopathology assessment system. RESULTS: Significantly less cartilage degradation (decreased levels of COMP) was found in the combined hormone treated group in comparison with OVX group. Similarly, both hormonal treatment resulted in increased bone formation and decreased bone resorption i.e., a low overall bone turnover status (decrease in the serum OC and CTX-1 levels). CONCLUSIONS: Combined estrogen and progesterone therapy was found to be convincing in terms of reducing the severity of OA in this experimental model.
Animals
;
Biological Markers/blood/metabolism
;
Bone Remodeling/*drug effects
;
Bone and Bones/chemistry/drug effects
;
Cartilage/chemistry/*drug effects
;
Collagen Type I/blood/metabolism
;
Disease Models, Animal
;
Estrogens/*pharmacology
;
Extracellular Matrix Proteins/blood/metabolism
;
Female
;
Glycoproteins/blood/metabolism
;
Histocytochemistry
;
Hormone Replacement Therapy/*methods
;
Osteoarthritis/blood/*drug therapy
;
Osteocalcin/blood/metabolism
;
Ovariectomy
;
Progesterone/*pharmacology
;
Rats
;
Rats, Sprague-Dawley
4.Histological Comparison of Vascular Grafts in a Pig to Goat Xenotransplantation Model.
Ji Hyuk YANG ; Kiick SUNG ; Won Gon KIM
The Korean Journal of Thoracic and Cardiovascular Surgery 2006;39(6):427-433
BACKGROUND: Current vascular prostheses are considered still inadequate for reconstruction of small-diameter vessels. To evaluate the potential use of xenograft vessels as small diameter arterial grafts, we implanted porcine vessels in goats. The grafts were treated with two different processes, freezing and acellularization, before implantation, and gross inspection as well as microscopic examination followed after a predetermined period. MATERIAL AND METHOD: Bilateral porcine carotid arteries were harvested and immediately stored at -70 degrees C within tissue preservation solution. One of them was designated as frozen xenograft vessel. The other one was put on acellularization process using NaCl-SDS solution and stored frozen until further use. Grafts were implanted in the place of carotid arteries of the same goat. The grafts have remained implanted for 1, 3, and 6 months in three animals, respectively. Periodic ultrasonographic examinations were performed during the observation period. After explantation, the grafts were analyzed grossly and histologically under light microscope. RESULT: All animals survived the experimental procedure without problems. Ultrasonographic examinations showed excellent patency of all the grafts during the observation period. Gross examination revealed nonthrombotic, patent lumens with smooth surfaces. Microscopic examinations of the explanted grafts showed cellular reconstruction at the 6-month stage in both grafts. Although more inflammatory responses were observed in the early phase of frozen xenografts, there was no evidence of significant rejection. CONCLUSION: These findings suggest that porcine xenograft vessels, regardless of pre-implantation processes of acelluarization or freezing, can be acceptably implanted in goats, although short duration of observation in a small number of animals may limit this study.
Animals
;
Bioprosthesis
;
Blood Vessel Prosthesis
;
Carotid Arteries
;
Freezing
;
Goats*
;
Heterografts
;
Tissue Preservation
;
Transplantation, Heterologous*
;
Transplants*
5.Intrascrotal Extratesticular Epidermal Cyst.
Seung Hyuk YIM ; Ji Hak JUNG ; Cho Hwan YANG ; Jun Sung KO ; Ji Yeol LEE
Korean Journal of Urology 2003;44(9):937-940
An epidermal cyst, presenting as an intrascrotal tumor, with no relation to the testicles or cord structures, is a rare benign tumor. Their etiology is unknown, but the most widely accepted theory on the histogenesis of testicular epidermal cysts is that they are the end result of a monolayer teratoma arising from germ cells; however, an extratesticular epidermoid cyst is believed to be an abnormal closure of the median raphe and urethral groove. An extratesticular epidermal cyst is normally subcutaneous, and can be localized anywhere along the median raphe, from the distal penis to the anus. To our knowledge, there has been no case reported in the Korean literature. A case of an intrascrotal epidermal cyst is reported in a 44-year-old man.
Adult
;
Anal Canal
;
Epidermal Cyst*
;
Germ Cells
;
Humans
;
Male
;
Penis
;
Scrotum
;
Teratoma
;
Testis
6.Expandable Metallic Stent Placement for Nutcracker Syndrome.
Seung Hyuk YIM ; Jun Sung KOH ; Hyun Woo KIM ; Cho Hwan YANG ; Ji Hak JUNG ; Ji Youl LEE
Korean Journal of Urology 2004;45(4):390-392
Herein, a new left renal vein stenting procedure (expandable metallic stent placement), which provided relief for an 18-year-old man incapacitated by an intermittent gross hematuria, is reported. The placement of an expandable metallic stent is a minimally invasive therapy, and a simpler and more physiological therapy than previous approaches to Nutcracker syndrome.
Adolescent
;
Hematuria
;
Humans
;
Renal Veins
;
Stents*
7.Planned Transfusion of D-Positive Blood Components in an Asia Type DEL Patient: Proposed Modification of the Korean National Guidelines for Blood Transfusion.
Sooin CHOI ; Sejong CHUN ; Ji Young SEO ; Ji Hyuk YANG ; Duck CHO
Annals of Laboratory Medicine 2019;39(1):102-104
No abstract available.
Asia*
;
Blood Transfusion*
;
Humans
8.Transfromation of Percutaneous Extracorporeal Life Support to Paracorporeal Ventricular Assist Device: A Case Report.
Chilsung KIM ; Yang Hyun CHO ; Kiick SUNG ; Ji Hyuk YANG
The Korean Journal of Thoracic and Cardiovascular Surgery 2014;47(4):409-412
Percutaneous extracorporeal life support (P-ECLS) is a useful modality for the management of refractory cardiac or pulmonary failure. However, venoarterial P-ECLS may result in a complication of left ventricular distension. In this case report, we discuss a patient with drug-induced dilated cardiomyopathy managed with venoarterial P-ECLS and a left atrial vent catheter. The venoarterial P-ECLS was modified to a paracorporeal left ventricular assist device (LVAD) by removing the femoral venous cannula. After 28 days of hospitalization, the patient was successfully weaned from the paracorporeal LVAD and discharged home from the hospital.
Cardiomyopathy, Dilated
;
Catheters
;
Extracorporeal Membrane Oxygenation
;
Heart Failure
;
Heart-Assist Devices*
;
Hospitalization
;
Humans
9.Transient J-Wave Appearance in the Inferior-Lateral Leads during Electrical Storm in a Patient with Brugada Syndrome.
Dong Hyuk YANG ; Hyuk Jeong KWON ; Jin Chul KIM ; Ji Hun JANG ; Sung Hee SHIN ; Jun KWAN ; Sung Il WOO ; Keum Soo PARK ; Dae Hyeok KIM
Korean Circulation Journal 2013;43(3):193-195
A 67-year-old male patient was admitted with an abrupt sudden cardiac death. He represented with an extreme electrical storm of 30 times of ventricular fibrillation (VF) episodes on one day. External shocks were performed to terminate VF. Transient J-wave in the inferior-lateral leads and Brugada electrocardiography pattern on the right precordial leads appeared during the electrical storm. And J-wave disappeared after the termination of electrical storm. We report a case of the appearance of J-wave during electrical storm in a patient with Brugada syndrome.
Brugada Syndrome
;
Death, Sudden, Cardiac
;
Electrocardiography
;
Humans
;
Male
;
Shock
;
Ventricular Fibrillation
10.Right Aortic Arch with a Retroesophageal Left Subclavian Artery and an Anomalous Origin of the Pulmonary Artery from the Aorta.
Chang Seok JEON ; Man shik SHIM ; Ji Hyuk YANG ; Tae Gook JUN
The Korean Journal of Thoracic and Cardiovascular Surgery 2017;50(1):44-46
We report the case of a newborn with a rare anatomic variation: a right aortic arch with a retroesophageal left subclavian artery and an anomalous origin of the pulmonary artery from the aorta. This variation was diagnosed using echocardiography and computed tomography, and we treated the condition surgically.
Anatomic Variation
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Aorta*
;
Aorta, Thoracic*
;
DiGeorge Syndrome
;
Echocardiography
;
Heart Defects, Congenital
;
Humans
;
Infant, Newborn
;
Pulmonary Artery*
;
Subclavian Artery*