No abstract available.
Mitochondrial Diseases*

The myoepithelioma is a rare salivary gland tumor composed nearly exclusively of myoepithelial cells. A case occuring on the parotid gland of a 51 year-old female is reported. Light microscopy finding revealed plasmacytoid cells. Ultrastructurally, the most of the neoplastic cells had polygonal outlines and showed eccentric, round to ovoid nuclei with even contours, peripherally distributed heterochromatin and to three small nuceoli. Their cytoplasms were almost completly filled with thin filaments, arranged in parallel strains and exhibiting "dense bodies". The neoplastic cells showed positive immunostaining for S-100 protein and cytokeratin.
Female ; Humans

The myoepithelioma is a rare salivary gland tumor composed nearly exclusively of myoepithelial cells. A case occuring on the parotid gland of a 51 year-old female is reported. Light microscopy finding revealed plasmacytoid cells. Ultrastructurally, the most of the neoplastic cells had polygonal outlines and showed eccentric, round to ovoid nuclei with even contours, peripherally distributed heterochromatin and to three small nuceoli. Their cytoplasms were almost completly filled with thin filaments, arranged in parallel strains and exhibiting "dense bodies". The neoplastic cells showed positive immunostaining for S-100 protein and cytokeratin.
Female ; Humans

To study reliability and validity of PWl, this newly developed self-administered questionnaire which measures stress, was given to medial students. All respondent(133) were followed 4 weeks later and 92 were retested. Cronbach's a coefficient of data was 0.93. Test-retest reliability measured by pearson's correlation coefficient was 0.72(p<0.01l). Exploratory factor analysis(EFA) performed by principal axis factor method without iteration and by varimax rotation explored 13 principal components(eigenvalues > l). After exploring 4 factor structure according to previous study results, factor 1 showed good agreement but other factors did not. Confirmatory factor analysis(CFA) showed poor fit of 4 factor model to data. In the further study, it may be considered to model that has unidimensional factor structure.
Axis, Cervical Vertebra ; Humans ; Surveys and Questionnaires ; Reproducibility of Results*

This study was designed to evaluate the effects of altered reticuloendothelial function on the formation of nospecific reactive hepatitis in rats. Increased activity of reticuloendothelial system was evoked by methylcellulose treatment (20 mg/100 g). Partial depression of reticuloendothelial system was induced by splenectomy. Experimental nospecific reactive hepatitis was made by Escherichia coli treatment, artificial stomach perforation ileum ligation, respectively. The nonspecific reactive hepatitis thus made evaluated by liver function tests such as AST ALT and alkaline phosphatase. Histological and electron microscopical observation were also done. The results obtained were as follows: 1. Functional and histological changes of nospecific reactive hepatitis deffered with the disign employed. 2. Partial reduction of reticuloendothelial activity by splenectomy didn't influence the serverity of nonspecific reactive hepatitis. 3. Increase of reticuloendothelial activity by methylcellulose treatmetns reduced the severity of nonspecific reactive hepatitis lesion developed by E. coli treatment and stomach perforation, both functionally and morphologically. 4. Changes of nonspecific reactive hepatitis by lieum ligations, however, were aggrevated by increased recticuloendothelial activity. These results showed the divers effect of altered reticuloendothelial function on the degree of nonspecific reactive hepatitis according to the employed experimental designs.

The cholestasis are defined as blockade or secretory distrubance of bile and appearance of bile in hepatocytes, Kupffer cells and biliary passages, usually associated with dilated bile canaliculi. Intra-and extraheptic cholestasis were induced by 17-ethinyl estradiol, or chlorpromazine hydrochloride and by ligation of bile duct to investigate the mechanism of the hepatic injury, ultrastructural changes of liver and alterations of liver function. The results obtained were as follows. 1) Functional and histological changes of intra-and extrahepatic cholestasis differed in various experimental groups. The liver weight is increased in 17-ethinyl estradiol treated group and ligation of bile duct group (5.6+/-0.15, P<0.001, 5.3+/-0.19 gm/100 gm body weight, P<0.001). The common features of intra-and extrahepatic cholestasis were double membrane bounded amorphous vesicular material infiltrations in the cytoplasm of hepatocyte, partial loss of microvilli of bile canaliculi, anf focal thickening of pericanalicular ectoplasm on electron microscopy. 2) Intrahepatic cholestasis induced by 17-ethinyl estradiol show significantly increased serum level of alkaline phosphatase and total bile aicd (134.0+/-16.82 IU/L, 29.5+/-4.68 umol/l). Kupffer cell proliferation and focal cytoplasmic degradation with myelin figures are characteristic features on electron microscopy. Chlorpromazine hydrochloride induced intrahepatic cholestasis show increased serum level of AST, ALT, Cholesterol and bilirubin (156.9+/-11.32, 49.0+/-2.83 IU/L, 59.3+/-6.73 mg/dl, 1.8+/-.043 mg/dl). Inflammatory cell infiltration, chiefly lymphocytes and esoinophils are seen in periportal area. Prominent vesiculation and vacuolations of smooth endoplasmic reticulum are characteristic feature on electron microscopy. 3) Extrahepatic cholestasis induced by ligation of bile duct show increase serum level of AST, ALT, GGT, cholesterol, total bile acid, and bilirubin (290.2+/-50.24, 171.5+/-47.17, 159.3+/-24.54, 33.7+/-1.47 IU/L, 86.6+/-9.18 mg/dl, 246.6+/-27.34 umol/l, 13.9+/-0.83 mg/dl). Light microscopically, morphologic alterations are feathery degeneration of hepatocytes, proliferation of bile ducts, bile infarct and prominent intracytoplasmic lipid droplets. Electron microscopically, electron dense acidophilic body, bile casts and complete loss of microvilli are seen in dilated bile canaliculi. Also noted are hypertrophy of cannalicular ectoplasm. Finely granular materials are infiltrated in degenerative cytoplasm.
Rats ; Animals

Schneiderian papillomas are papillary lesions of the nasal cavity paranasal sinuses that arise from the Schneiderian membrane, a membrane of ectodermal origin embryologically derived from the nasal placodes. This membrane is characterized by transitional type epithelium, similar to bladder urothelium, with admixed microcysts or mucin droplets. It has a tendency to recur after removal and transform into malignancy even though rare. Total 27 cases of Schneiderian papillomas were examined in the Chosun University medical college, which were collected from 1978 to 1986. The results obtained were as follows: 1) There were 19 male and 8 female patients, and mean age at diagnosis was 50.5+/-12.0 (SD) year (27-74 years). 2) Nasal obstruction or perception of nasal mass was the most common presenting symptom; Mean duration of symptoms was 25.8+/-15.0 (SD) month (4-48 months). 3) Numbers of papillomas had predominantly endophytic (inverted, n=17) and predominantly exophytic (fungiofrom n=6) patients, and four had mixed pattern. 4) In 27 patients, recurrences developed in 9, local invasion in one (with an inverted papilloma), and epidermoid carcinoma in one (with an inverted papilloma).
Female ; Male ; Humans

No abstract available.

No abstract available.
Heart* ; Hyperbilirubinemia* ; Thoracic Surgery*

No abstract available.
Humans ; Male ; Military Personnel*