Growth stimulatory/inhibitory factors and their receptors are the important mediators of control of epithelial cell proliferation and differentiation. The aim of this study was to observe the distribution of epidermal growth factor receptor (EGFR) and transforming growth factor-beta1 type II receptor (TbetaRII) during carcinogenesis of oral squamous cell carcinoma (OSCC). Formalin fixed, paraffin embedded tissue from 25 oral leukoplakias (OL) and 15 OSCC was immunostained by avidin-biotin complex method. In OSCC, the carcinomatous area and the adjacent dysplastic/ hyperplastic area were examined. In OL, the hyperplasia and the epithelial dysplasia were examined. Monoclonal anti-EGFR Ab and polyclonal anti-TbetaRII Ab were applied. EGFR was mainly expressed in the basal layer and was increased with epithelial dysplasia in OL. TbetaRII was not detected in the basal cell layer and dysplastic area in OL. In contrast, the dysplastic area adjacent to OSCC showed positivity in the entire layer including the dysplastic area. In all cases of OSCC, both EGFR and TbetaRII showed positive reactions. EGFR was increased with the progression to the malignancy, and the expression pattern of TbetaR II was altered to be positive in the basal cell layer with progression to malignancy. These results suggest that the expression of EGFR appeared to be an early event and TbetaR II may be related to malignant transformation during oral carcinogenesis. The expression pattern of EGFR and TbetaR II may contribute to predict the risk of the development of carcinoma in oral premalignant lesions.
Carcinogenesis ; Carcinoma, Squamous Cell* ; Epidermal Growth Factor* ; Epithelial Cells ; Formaldehyde ; Hyperplasia ; Leukoplakia, Oral* ; Paraffin ; Receptor, Epidermal Growth Factor*

No abstract available.
Nevus

No abstract available.
Dapsone ; Drug Hypersensitivity

No abstract available.
Facial Bones*

PURPOSE: Ventriculoperitoneal (VP) shunt insertion is an important treatment modality in children with hydrocephalus. VP shunt infection is a major complication and an important factor that determines the surgery outcome. This 15-year study was performed to evaluate the epidemiology of VP shunt infections in pediatric patients treated at our center. METHODS: A retrospective review of medical records was performed in patients 18 years old or younger who underwent VP shunt insertion surgery from April 1995 to June 2010. RESULTS: Three hundred twenty-seven VP shunt surgeries were performed in a total of 190 pediatric patients (83 females, 107 males). The median age of the patients was 2.4 years (range, 0.02-17.9 years). Having a malignant brain tumor was the most frequent cause for VP shunt insertion. The shunt infection rate was 6.7% (22/327) per 100 operations and 9.5% (18/190) per 100 patients, and the incidence rate was 0.45 infection cases per 100 shunt operations-year. The most common pathogen was coagulase-negative staphylococcus (n=7) followed by methicillin resistant Staphylococcus aureus (n=1). Ten cases were treated with vancomycin and beta-lactam antibiotic (cephalosporin or carbapenem) combination therapy and 7 cases were treated with vancomycin monotherapy. The median duration of antibiotic treatment was 26 days (range, 7 to 58 days). Surgical intervention was performed in 18 cases (18/22, 81.8%). CONCLUSION: Epidemiologic information regarding VP shunt infections in pediatric patients is valuable that will help guide proper antibiotic management. Additional studies on the risk factors for developing VP shunt infections are also warranted.
Brain Neoplasms ; Child ; Epidemiologic Studies ; Female ; Humans ; Hydrocephalus ; Incidence ; Medical Records ; Methicillin Resistance ; Retrospective Studies ; Risk Factors ; Staphylococcus ; Staphylococcus aureus ; Vancomycin ; Ventriculoperitoneal Shunt

No abstract available.
Dyskeratosis Congenita* ; Female ; Humans

BACKGROUND: Cleaning and disinfection of fiberoptic bronchoscope requires careful attention, especially to mycobacterium species because the contamination of mycobacteria could raise confusion on diagnosis. Recently, we detected contamination of Wydex(R) solution used in bronchoscope washer with Mycobacterium chelonae. In this study, we evaluated the mycobactericidal effect of 12 kinds of disinfectants for M. chelonae. METHOD: To evaluate the bactericidal effect of Wydex(R) 2%, Cidex(R) 2.25%, Cidex(R) 3%, Bacteriokiller (BK) disinfectant, Perasafe(R), HICLO-S(R), Lamicine(R), ethanol, Instrusept(R), Virkon(R), Betadine(R), and Vipon(R) against M. chelonae, culture was performed after exposure of two M. chelonae strains (ATCC 35749, the type strain and the strain isolated from contaminated Wydex(R) solution) to each disinfectant solution. The growth of organism was examined for up to 8 weeks. RESULTS: Growth of M. chelonae (reference strain of ATCC 35749 and isolated strain) was observed after a week incubation for Wydex(R) 2%, Cidex(R) (2.25%, 3%) and control. For BK disinfectant and Perasafe(R), they grew after 2-3 weeks, and 3-4 weeks, respectively. For HICLO-S(R) and Lamicine(R), only the contaminated strain grew after two and three weeks, respectively. For ethanol, Virkon(R), Betadine(R), Vipon(R), and Instrusept(R) , growth was not observed from either strain. CONCLUSIONS: On the basis of these results, Instrusept(R), virkon(R), ethanol, Betadine(R), and Vipon(R) were effective for the disinfection of M. chelonae. Especially, Instrusept(R) was thought to be useful as a disinfectant for bronchoscopes because it has advantages including non-corrosiveness, chemical stability, and non-irritativeness. And additional washing with ethanol might be effective. The finding that strain isolated from contaminated bronchoscopes was more resistant to disinfectants than reference strain suggested that the more resistant strains are selected throughout the improper disinfection.
Bronchoscopes ; Diagnosis ; Disinfectants* ; Disinfection ; Ethanol ; Mycobacterium chelonae* ; Mycobacterium*

No abstract available.

No abstract available.

OBJECTIVES: Subacute thyroiditis is a nonsuppurative inflammation of thyroid gland and is probably caused by a cytopathic virus. Typical clinical symptoms and features of subacute thyroiditis vary widely during the course of illness. It has a clinical course, evolving from hyperthyroidism through a temporary hypothyroidism to recovery. However, the final outcome of this disease remains unpredictive in some patients. Permanet hypothyroidism occurs infrequently. METHODS: Thirty-three patients proven to have subacute thyroiditis at the Ewha Womans University Hospital from September 1993 to November 1995 were studied. We analyzed their clinical features, laboratory findings, and duration of recovery to cha- racterize the course of the disease. RESULTS: 1) Total 33 patients were studied: 31 patients were female and 2 patients were male. Their mean age was 42.6+/-8.3 years old. The peak months were August through October in this study. 2) Initial mean ESR was 73.0+/-35.2mm/hr, mean T3 was 217.3+/-73.9ng/dl, mean T4 was 15.2+/-8.5microgram/ dl, and TSH was 0.06+/-0.09microIU/ml. The positive rates of antithyroglobulin and anitmicrosomal antibodies were 31% and 6% respectively, and TSH receptor antibody was elevated in one patient. 3) In the thyroid scan, 91% showed both lobes nonvisualisation, and 9% showed one lobe nonvisualization. Radioactive iodine uptake(RAIU) at 24 hour was 2.4+/-3.3%. 4) With the predisolone therapy, 90% of patients completely recovered, 57% of these patients had no hypothyroid phase and remaining 33% of them had hypothyroid phase during course of the disease. Three of the patients had permanent hypothyroidim. 5) The average duration of recovery was 3.2+/-1.4 months and it has no correlation with initial thyroid hormone levels, antithyroid antibodies and duration of steroid administration. CONCLUSION: There was no historical, physical, laboratory findings that help us predict those patients likely to have an exacerbation of the disease.
Antibodies ; Female ; Humans ; Hyperthyroidism ; Hypothyroidism ; Inflammation ; Iodine ; Male ; Prednisolone ; Receptors, Thyrotropin ; Thyroid Gland ; Thyroiditis, Subacute