1.Detection of N-myc Gene Amplification in Neuroblastoma Using the Semiquantitative Polymerase Chain Reaction.
Dong Woo PARK ; Chang Hoon LEE ; Kap Jun YOON ; Hwang Min KIM ; Woo Ick YANG
Korean Journal of Clinical Pathology 1997;17(2):351-359
No abstract available.
Genes, myc*
;
Neuroblastoma*
;
Polymerase Chain Reaction*
2.The Effect of Oral Ketoconazole in Dermatophytosis.
Jahng Won JUNN ; Do Hun HWANG ; Chang Hoon KWAK ; Jae Hong KIM ; Joong Hwan KIM
Korean Journal of Dermatology 1984;22(1):16-21
Seventeen volunteers with cutaneous dermatophytosis were enrolled in a clinical trial to evaluate the effectiveness of oral ketoconazole. The group included six patients with tinea cruris(6 malcs), four with tinea corporis, including one with tinea faciai, (3 males, 1 female), three with tinea versicolor(3 males) and four with tinea capitis(3 males, 1 female). The oral ketoconazole was taken within 10 minutes after a meal. The patients under the age of 10 received 100mg of ketoconazole per day, whereas those aged over 11 received 200mg of ketoconazole until the skin lesions are cured. Seventeen patients had complete clinical and mycologic cure, one responded clinically. It required one to four weeks to become culturally negative for tinea cruris, four to seven weeks for tinea corporis, three to eight weeks for tinea capitis. For tinea versicolor it required three to five weeks to become negative by scotch tape method. Adverse reactions to ketoconazole were absent and no patients required discontinuation of the drug. The results indicate that ketoconazole is a safe and effective drug for the treatment of dermatophytosis.
Humans
;
Ketoconazole*
;
Male
;
Meals
;
Skin
;
Tinea Capitis
;
Tinea Versicolor
;
Tinea*
;
Volunteers
3.Signal Hyperintensities on Brain Magnetic Resonance Imaging in Late-life Depressive Patients.
Sung Hoon JIN ; Seong Hye HWANG ; Chang Hyun KIM
Journal of Korean Geriatric Psychiatry 1998;2(2):160-166
OBJECTIVES: This study was performed to investigate the relationship between age of onset in late-life depression and T2 hyperintensities observed in the brain MRI, we tried to see part of pathophysiology of late-life depression. METHOD: The subjects consisted of 18 patients whose first depressive episode occurred before age 50, and 20 patients whose first depressive episode occurred after age 50 years, and 20 agematched controls. Depressive patients were diagnosed according to DSM-IV. Established hyperintensity rating systems were used to analyse the T2 weighted images and blood pressure, cholesterol level, DM, EKG were measured to compare the relationships. RESULTS: 1) Signal hyperintensities on T2 weighted image were more severe in late-life depressive patients whose first depressive episode after age 50 (p<0.05) and there is no significant difference between patients whose first episode before age 50 and age-matched control subjects. 2) Mild signal hyperintensities were observed in all elderly depressed patients and control subjects, but severe hyperintensities were observed in late-onset depression. 3) Signal hyperintensities were related to age, hypertension, blood cholesterol level (p<0.05). CONCLUSION: The late onset depressive patients had more white matter hyperintensities on T2 weighted image than early onset depressive patients. this results support previous hypothesis that white matter change is the important biological factor of late-onset elderly depression and old age, hypertension, hypercholesterolemia may be associated with signal hyperintensities.
Age of Onset
;
Aged
;
Biological Factors
;
Blood Pressure
;
Brain*
;
Cholesterol
;
Depression
;
Diagnostic and Statistical Manual of Mental Disorders
;
Electrocardiography
;
Humans
;
Hypercholesterolemia
;
Hypertension
;
Magnetic Resonance Imaging*
4.The Effect of Opening Lamina Terminalis on the Development of Hydrocephalus after Aneurysmal Subarachnoid Hemorrhage.
Yeoung Hak HWANG ; Dong Hoon LEE ; Sang Hoon LEE ; Ho Kyung KIM ; Chang Gu KANG ; Ui Wha CHUNG
Journal of Korean Neurosurgical Society 2000;29(5):609-614
No abstract available.
Aneurysm*
;
Hydrocephalus*
;
Hypothalamus*
;
Subarachnoid Hemorrhage*
5.Direct Percutaneous Needle Puncture and Intrapulmonary Lymphatic Embolization for Treatment of Chylothorax in a Patient with Lymphoma
Bo Lee HWANG ; Hoon KWON ; Chang Ho JEON ; Chang Won KIM
Journal of the Korean Radiological Society 2020;81(5):1222-1226
Lymphoma is a common cause of nontraumatic chylothorax. Clinical success rates of thoracic duct embolization are lower in patients with nontraumatic chylothorax compared to patients with traumatic chylothorax. Herein, we report a case of nontraumatic chylothorax and lymphoma in a 77-year-old man managed with thoracic duct embolization. The chest tube drainage decreased but not was sufficient to enable removal of the chest tube. Therefore, a second embolization was performed through a direct puncture of the lymphatic mass in the lung, following which the chyle leakage ceased, and the chest tube was removed. The treatment strategy discussed in this report may be an effective therapeutic option for select patients with nontraumatic chylothorax.
6.The Clinical Significance of Vestibular Evoked Myogenic Potential Evoked by Click Sound.
Sang Hoon PARK ; Chang Il CHA ; Kwang Hoon KIM ; Hoon KIM ; Myoung Gu HWANG ; Nam Pyo HONG
Korean Journal of Otolaryngology - Head and Neck Surgery 2001;44(12):1253-1258
BACKGROUND AND OBJECTIVES: The human vestibule is known to be able to induce cervical muscle potential secondary to strong acoustic stimulations. This reflex is assumed to originate in the saccule, and is called "vestibular evoked myogenic potentials" (VEMP). The responses consist of alternatively positive and negative successive waves (p13-n23). This study was designed to evaluate the clinical significance of VEMP. MATERIALS AND METHOD: We studied the difference among the latencies of p13, n23 and the amplitudes among the 10 normal volunteers, 5 patients with sudden sensorineural hearing loss and 10 patients with vestibulopathy. And we compared the result of the caloric test and VEMP in patients with vestibulopathy. RESULTS: In the normal group, VEMP was detected in all and all of the sudden sensorineural hearing loss patients showed VEMP both in the affected and unaffected side. In unilateral vestibulopathy patients, VEMP were present in the unaffected side but not in the affected side. The difference between the amplitudes and latencies were not found in those cases where VEMP was detected. In vestibulopathy patients, VEMP were well correlated with the result of the caloric tests. CONCLUSION: We confirmed that VEMP is originated from the vestibule, not from cochlea. VEMP could provide itself as an addition method for testing the vestibule.
Acoustics
;
Caloric Tests
;
Cochlea
;
Healthy Volunteers
;
Hearing Loss, Sensorineural
;
Humans
;
Reflex
;
Saccule and Utricle
7.Successful Treatment of Erdheim-Chester Disease with Multisystemic Involvement in a 4-year-old Child by Interferon-α and Corticosteroid
Jung Won HWANG ; Chang Hoon AN ; Min Kyung LEE ; Pyoung Han HWANG
Clinical Pediatric Hematology-Oncology 2017;24(1):69-74
Erdheim-Chester disease (ECD) is a rare form of proliferative non-Langerhans cell histiocytosis that involves multiple organs and is associated with a high mortality. The prognosis of ECD is variable, and it mainly depends on the involved anatomic sites. The treatment modalities have not been standardized, but interferon-α (IFN-α) has been reported to be effective in the management of ECD. ECD usually affects middle aged individuals with a slight male predominance but is extremely rare in children. We present an uncommon case of a 4-year-boy diagnosed with ECD who was treated with IFN-α and corticosteroid. He remained disease-free for 3 years after the completion of treatment.
Child
;
Child, Preschool
;
Erdheim-Chester Disease
;
Histiocytosis
;
Humans
;
Male
;
Middle Aged
;
Mortality
;
Prognosis
8.Conservative approach for anterior crown-root fractured teeth: forced eruption
Ji-Eun KIM ; Sung-Hyeon CHOI ; Hoon-Sang CHANG ; Yun-Chan HWANG ; In-Nam HWANG ; Won-Mann OH
Journal of Dental Rehabilitation and Applied Science 2020;36(1):48-54
In the case of crown-root fracture due to traumatic injury in anterior tooth and the fracture margin is located subgingivally,forced eruption has been proposed for the reconstruction of deficient bone and soft tissue. Forced eruption is one of the easiestorthodontic approaches that can have an acceptable outcome and prognosis, and has a low incidence of relapse. However, using heavy forces or very fast movements can also cause tissue damage or ankylosis. The following case reports present forced eruption as treatment option of crown fracture in maxillary anterior teeth.
9.Effects of CTHRC1 on odontogenic differentiation and angiogenesis in human dental pulp stem cells
Jong-soon KIM ; Bin-Na LEE ; Hoon-Sang CHANG ; In-Nam HWANG ; Won-Mann OH ; Yun-Chan HWANG
Restorative Dentistry & Endodontics 2023;48(2):e18-
Objectives:
This study aimed to determine whether collagen triple helix repeat containing-1 (CTHRC1), which is involved in vascular remodeling and bone formation, can stimulate odontogenic differentiation and angiogenesis when administered to human dental pulp stem cells (hDPSCs).
Materials and Methods:
The viability of hDPSCs upon exposure to CTHRC1 was assessed with the WST-1 assay. CTHRC1 doses of 5, 10, and 20 µg/mL were administered to hDPSCs.Reverse-transcription polymerase reaction was used to detect dentin sialophosphoprotein, dentin matrix protein 1, vascular endothelial growth factor, and fibroblast growth factor 2. The formation of mineralization nodules was evaluated using Alizarin red. A scratch wound assay was conducted to evaluate the effect of CTHRC1 on cell migration. Data were analyzed using 1-way analysis of variance followed by the Tukey post hoc test. The threshold for statistical significance was set at p < 0.05.
Results:
CTHRC1 doses of 5, 10, and 20 µg/mL had no significant effect on the viability of hDPSCs. Mineralized nodules were formed and odontogenic markers were upregulated, indicating that CTHRC1 promoted odontogenic differentiation. Scratch wound assays demonstrated that CTHRC1 significantly enhanced the migration of hDPSCs.
Conclusions
CTHRC1 promoted odontogenic differentiation and mineralization in hDPSCs.
10.The Relationship Between Hippuric Acid in Blood Plasma and Toluene Concentration in the Air of Workplace.
Cheon Hyun HWANG ; Won Jin LEE ; Soung Hoon CHANG ; Hyoung Ah KIM
Korean Journal of Preventive Medicine 2000;33(1):45-50
OBJECTIVES: This study was undertaken to evaluate correlation between the levels of hippuric acid in blood plasma (HAP) and those of toluene concentration in the workplace air. METHODS: Study subjects were composed of two groups; 21 workers who were occupationally exposed to toluene and 25 rural-area residents who were not exposed to any known occupational toluene source, as an exposed group and a reference group, respectively. Mean age and work duration of the exposed was 42 years and five years, respectively. Mean age of the reference was 42 years. To determine toluene concentrations in the workplace air, air sampling has been conducted for more than six hours using a personal sampler, and analyzed by a gas chromatography-flame ionization detector. Concentrations of hippuric acid in biological samples were determined by a high performance liquid chromatography-ultraviolet detector. RESULTS: Geometric mean(geometric standard deviation) of HAP and hippuric acid in urine(HAU) for the exposed was 1.39(2.21) mg/L and 2.77(1.46) g/L, respectively, which were significantly different from those of the reference [HAP, 0.45(2.94); HAU, 0.37(0.45)]. Toluene concentration in the workplace air was 86.92(range: 45.18~151.23) ppm. The level of HAP or HAU was significantly correlated (r=0.70 and r=0.63, respectively) with that of toluene in the workplace air. The estimated regression equation was logHAP(mg/L)=-3.60+1.93 log(toluene, ppm) or logHAU(g/L)=-0.85+0.67 log(toluene, ppm). The magnitude of correlation was further enhanced when analyzing relationship between toluene concentrations lower than 100 ppm and its corresponding HAP levels. CONCLUSION: Overall, plasma hippuric acid levels were well correlated with toluene concentrations in the workplace air, and a statistically significant correlation was observed for the samples with toluene concentration lower than 100 ppm.
Chromatography, High Pressure Liquid
;
Humans
;
Occupations
;
Plasma*
;
Toluene*