In order to study the exposure level of silica dust and the effects of silica dust on ventilatory function, respirable dust samples were collected by personal air samplers using NIOSH method 0500 from the selected foundry operations, and ventilatory function tests were performed on 209 male foundry workers and 239 male control subjects. Ventilatory indices such as forced vital capacity (FVC) , one-second forced expiratory volume (FEV1), ratio of FEV1 to FVC(FEV1 %), maximal mid-expiratory flow(MMF), peak expiratory flow rate (PEFR) and maximal expiratory flow at 25, 50 and 75 % of expired FVC (FEF25, FEF50, FEF75 were obtained by analyzing forced expiratory spirogram and maximal expiratory flow-volume curve which were simultaneously measured by Vitalography in standing position. The results were as follows : 1. The average quartz concentrations of respirable dust were the highest in melting operation (0.079 mg/m3) and followed by molding operation (0.051 mg/m3), finishing operation (0.041 mg/m3) and coremaking operation (0.023 mg/m3) in the descending order. 2. No significant differences for mean values of all ventilatory indices expressed as percent of predicted value were demonstrated between smokers and nonsmokers In foundry workers and control subjects. 3. Mean values of all ventilatory indices except FVC of foundry workers were significantly lower than those of control subjects. 4. Mean values of FEV1 %, MMF, FEF25, FEF50 and FEF75 expressed as percent of predicted value tended to decrease with increasing cumulative dust exposure. 5. In foundry workers, proportions of workers with low MMF, FEF50 and FEF75 were markedly higher than those with other indices, and were significantly increased with increasing cumulative dust exposure. 6. In foundry workers, 2 workers(1.0 %) were diagnosed as silicosis and the profusion of radiographic opacities were category 1/0 and q type. With the above considerations in mind, it suggested that increasing exposure of silica dust be associated with progressive deterioration in ventilatory function of an obstructive nature and that MMF, FEF50 and FEF75 be more sensitive indices in the detection of the early obstructive changes of air flow of workers exposed to silica dust.
Dust* ; Forced Expiratory Volume ; Freezing ; Fungi ; Humans ; Male ; National Institute for Occupational Safety and Health (U.S.) ; Peak Expiratory Flow Rate ; Quartz ; Silicon Dioxide* ; Silicosis ; Vital Capacity

No abstract available.
Odontogenic Cyst, Calcifying

PURPOSE: Tumor invasion and metastasis are multistep phenomina, involving proteolytic degradation of extracellular matrix (ECM) and alteration of cell adhesion. It is another oncologic therapeutic strategy to block tumor invasion and metastasis through analyzing the molecules which are involved in these processes. We examined the expressions of some of matrix metalloproteinases (MMPs) in colorectal cancer and analyze the correlation with clinical factors and survival. METHODS: Fifty-five patients with colorectal cancer who underwent surgical resection were included. The expressions of the MMP-2, -7, -9, and -12 in tumor tissue and normal mucosa using RT-PCR technique was carried out. We evaluated and analyzed the correlation among these molecules, clinical characteristics, and survival. RESULTS: Expressions of MMP-7, -9, and -12 were significantly higher in tumor tissue than in normal mucosa (P=0.00). The expressions of MMP-2 between cancer and normal mucosa had no significant difference but it had a significant difference according to the lymph node (LN) invasion (P=0.03) in tumor tissues. Three-year overall survival was worse in patient with high expression of MMP-2 compared to low expression. CONCLUSION: The expressions of MMP-7, -9, -12 in tumor tissue were higher than in normal mucosa and MMP-2 expression of tumor tissues had a significant difference according to LN invasion. MMP-2 overexpression seems to be a prognostic factor for 3-yr overall survival. But, large scale study with long term survival analysis will be needed for the prognostic significance of MMPs.
Cell Adhesion ; Colorectal Neoplasms ; Extracellular Matrix ; Humans ; Lymph Nodes ; Matrix Metalloproteinase 2 ; Matrix Metalloproteinases ; Mucous Membrane ; Neoplasm Metastasis

PURPOSE: Endobronchial tuberculosis and bronchogenic cancer are common causes of atelectasis or obstructive pneumonitis in Korea. Differntiation between endobronchial tuberculosis and bronchogenic carcinoma is important for the treatment and prognosis but it is sometimes difficult to differentiate these two lesions with radiologic examinations. The purpose of this study was to find the differential points between endobronchial tuberculosis and bronchogenic carcinoma associated with atelectasis or obstructive pneumonitis. MATERIALS AND METHODS: Forty patients in whom atelectasis or obstructive pneumonitis was detected on chest radiographs comprised the study. A definite mass opacity was not observed on chest radiographs in all patients. In these patients, the causes of obstruction were endobronchial tuberculosis (n=20) and bronchogenic cancer (n=20) which were microbiologically or pathologically confirmed. RESULTS: Double obstructive lesions were more frequently found in endobronchial tuberculosis (8/20) than in bronchogenic cancer (1/20). Multiple calcifications along the bronchial wall and severe distortion of bronchi were observed only in endobronchial tuberculosis (4/20) and associated low density mass at obstruction site was only observed in bronchogenic cancer (6/20). Bronchial dilatation (11/20) and parenchymal calcifications (14/20) distal to obstruction site, air containing bronchogram at post obstructive bronchus (14/20) were more frequently found in endobronchial tuberculosis. Contour bulging at obstruction site (14/20), and only mucus bronchogram at post obstructive bronchus (14/20) were more frequently found in bronchogenic carcinoma. CONCLUSION: In patients with atelectasis or obstructive pneumonitis, endobronchial tuberculosis is characterized by double obstructive lesion, multiple calcifications at the bronchial wall, and severe distortion of the bronchi. Endobronchial carcinoma is characterized by a low density mass at the obstructive site.
Bronchi ; Carcinoma, Bronchogenic* ; Dilatation ; Humans ; Korea ; Mucus ; Pneumonia* ; Prognosis ; Pulmonary Atelectasis* ; Radiography, Thoracic ; Tuberculosis*

Purpose: To evaluate the utility of a quantitative forced cyclorotation test using a smartphone in patients with unilateral superior oblique palsy. Methods: Twenty-nine patients who underwent muscle surgery for superior oblique palsy were included. With patients under anesthesia prior to surgery, the 12 and 6 o’clock positions of the limbus were marked, the globe was maximally excyclorotated and incyclorotated, and photographs of the globe were taken in each position. The maximum angle of rotation was read by two masked observers using two different smartphone applications. Maximum excyclorotation and incyclorotation were compared between patients with superior oblique palsy alone and patients with both superior oblique palsy and intermittent exotropia; associations were evaluated regarding age at surgery, angle of hypertropia, and cyclotorsion on fundus photographs. Results: The intraclass correlation coefficient between the two readers was 0.989. The maximum excyclorotation of affected eyes was significantly greater than that of the fellow eyes (46.1 ± 9.9° vs. 41.7 ± 7.6°; p = 0.040). Maximum incyclorotation did not differ between the two eyes. The maximum excyclorotation of affected eyes of 18 patients with unilateral superior oblique palsy alone was significantly greater than that of the fellow eyes (47.0 ± 9.5° vs. 39.4 ± 6.3°; p = 0.010). The maximum excyclorotation of affected eyes of 11 patients with both superior oblique palsy and intermittent exotropia was similar to that of the fellow eyes (44.5 ± 10.9° vs. 45.5 ± 8.3°). Maximum incyclorotation did not differ according to group or eye. Maximum excyclorotation did not differ according to age at surgery, angle of hypertropia, or cyclotorsion on fundus photographs. Conclusions New forced cyclorotation tests using a smartphone quantitatively assess the passive range of cyclorotation, and detect bilateral differences, particularly in patients with unilateral superior oblique palsy alone.

No abstract available.
Craniosynostoses ; Muscles

Purpose: To evaluate the utility of a quantitative forced cyclorotation test using a smartphone in patients with unilateral superior oblique palsy. Methods: Twenty-nine patients who underwent muscle surgery for superior oblique palsy were included. With patients under anesthesia prior to surgery, the 12 and 6 o’clock positions of the limbus were marked, the globe was maximally excyclorotated and incyclorotated, and photographs of the globe were taken in each position. The maximum angle of rotation was read by two masked observers using two different smartphone applications. Maximum excyclorotation and incyclorotation were compared between patients with superior oblique palsy alone and patients with both superior oblique palsy and intermittent exotropia; associations were evaluated regarding age at surgery, angle of hypertropia, and cyclotorsion on fundus photographs. Results: The intraclass correlation coefficient between the two readers was 0.989. The maximum excyclorotation of affected eyes was significantly greater than that of the fellow eyes (46.1 ± 9.9° vs. 41.7 ± 7.6°; p = 0.040). Maximum incyclorotation did not differ between the two eyes. The maximum excyclorotation of affected eyes of 18 patients with unilateral superior oblique palsy alone was significantly greater than that of the fellow eyes (47.0 ± 9.5° vs. 39.4 ± 6.3°; p = 0.010). The maximum excyclorotation of affected eyes of 11 patients with both superior oblique palsy and intermittent exotropia was similar to that of the fellow eyes (44.5 ± 10.9° vs. 45.5 ± 8.3°). Maximum incyclorotation did not differ according to group or eye. Maximum excyclorotation did not differ according to age at surgery, angle of hypertropia, or cyclotorsion on fundus photographs. Conclusions New forced cyclorotation tests using a smartphone quantitatively assess the passive range of cyclorotation, and detect bilateral differences, particularly in patients with unilateral superior oblique palsy alone.

PURPOSE: In the Summer 1996, there was an outbreak of aseptic meningitis without sequele. 116 cases who were admitted to our Department during a six month period from May to October, 1996. Therefore, we report epidemic of aseptic meningitis in 1996 and analyze and compare it with a epidemic of aseptic meningitis in 1993. METHODS: We studies about clinical manefestation and laboratory finding by retrospective study on 116 patients diagnosed as aseptic meningitis who had been admitted at Department of Pediatrics, Kangnam Sacred Heart Hospital, College of Medicine, Hallym University. RESULTS: 1) Aseptic meningitis affected mostly children between the ages of 1 to 5 in 1996. Male-to-female ratio was 1.2 : 1 in aseptic meningitis in 1996. 2) The outbreak of aseptic meningitis was from middle to late August in 1996.3) Common chief complaints were fever, headache, vomiting, abdominal pain, upper respiratory tract infection, diarrhea, and irritibility in order. On physical examination, pharyngeal injection, neck stiffness, Kernig's sign were detected in decreasing frequency. 4) Values of WBC on peripheral blood were 5000-10,000/mm3 (60 cases, 51.7%) and values of ESR were more than 20mm/Hr (70 cases, 60.3%) and values of CRP positivity were 58 cases (50.0%) in 1996. In comparision with its in 1996, more than 10,000/mm3 in values of WBC and less than 20mm/hr in values of ESR and negativity in CRP values were detected mostly in 1993. 5) 176 cerebrospinal fluid studies were done. WBC count in cerebrospinal fluid were 6-75,000/mm3 (754+/-2351/mm3) and peaked on eighth days of onset of illness and decreased afterwards. Pleocytosis of cerebrospinal fluid were had of mean value 27.2% and peaked on first days of onset of aseptic meningitis. On virus culture, six cases were cultured in that one case of coxsakie virus, two cases of echo virus and six cases of nonspecific enterovirus and on enterovirus PCR, the positivity were 49 cases (41.0%). 6) 76 cases of who were diagnosed as aseptic meningitis were treated with antibiotics and 18 cases treated with mannitol for severe headache. None cases reported with seizure or decreased consciousness. The disease course mostly were three to seven days. CONCLUSIONS: We concluded that the causative agents of outbreak of aseptic meningitis in our hospital in 1996 were enterovirus and on virus culture, echo virus 9 and coxsackie virus A24 were cultured. Recently in our state, outbreak of aseptic meningitis epidemically in summer season and the causative viruses are cultured variably and various clinical symptoms and signs are manafested as well as.
Abdominal Pain ; Anti-Bacterial Agents ; Cerebrospinal Fluid ; Child ; Consciousness ; Diarrhea ; Echovirus 9 ; Enterovirus ; Enterovirus B, Human ; Fever ; Headache ; Heart ; Humans ; Leukocytosis ; Mannitol ; Meningitis, Aseptic* ; Neck ; Pediatrics ; Physical Examination ; Polymerase Chain Reaction ; Respiratory Tract Infections ; Retrospective Studies ; Seasons ; Seizures ; Vomiting

Clear cell sarcoma is rare and difficult to diagnose. Herein, we present a case of clear cell sarcoma in the dorsum of the wrist with MRI findings, including diffusion-weighted imaging, and histopathologic correlation, which was initially diagnosed as giant cell tumor of tendon sheath.
Diffusion Magnetic Resonance Imaging ; Giant Cell Tumors ; Magnetic Resonance Imaging* ; Sarcoma, Clear Cell* ; Tendons ; Wrist*