This study was carried out to visualize lead by Timm sulphide silver method and to define lead-induced change of duodenal absorptive cells of rat after administration of 0.01% lead acetate with drinking water. Sprague-Dawley rats, weighing 250g, were used, and they were orally administered with 0.01% sodium acetate and sacrificed at 0.5, 1, 1.5 hours and 2, 7, 15, 30, 45, 60 days after administration. A portion of duodenal tissue was observed under light microscope, scanning and transmission electron microscopes after development with Danscher method. The blood lead concentration in experimental group began to increase from the 2nd day after administration, and it increased gradually until the 45th day and decreased at the 60th day. On light microscope, many brown lead granules were observed at the villi tip at the 2nd day. There is mild blunting of villi tip at the 45th day. At the 60th day, most of the villi were mildly shortened and showed lymphangiectasia. On scanning electron microscope, the villi tip was mildly blunted and the extrusion zone became irregular at the 45th day. The depth of creases did not change. At the 60th day, the villi tip was moderately blunted and the extrusion zone was markedly irregular. The depth of creases increased. On transmission electron microscope, at 0.5 hour after oral administration, numerous lead granules were diffusely scattered and were not confined to any specific microorganelles. The lead granules decreased with time. At the 7th 15th day, the intercellular spaces were widened and several vacuoles appeared and the condensation of mitochondrial matrix. There was also ribosomal detachment from RER, and there was neither secondary lysosomes or post-lysosomes. At the 30th and 45th day, secondary lysosomes appeared and the condensation of mitochondrial matrix with early formation of myelin figures was noted. At the 60th day, the intercellular space widening extended to the upper most portion of the cells, and nonspeciqic degenerative changes became severe. In view of above mentioned findings, it can be concluded that passive diffusion as well as active transport was partly involved in the absorption of lead. Most of the changes of microorganelle are compatible with nonspecific degenerative changes which could occur due to impairment of oxidative phosphorylation.
Rats ; Animals

Allergic contact dermatitis from aroma oils has long been recognized and with increasing frequency. Contact dermatitis of the allergic type of fragrances used for aromatherapy has been reported rarely, and only in patients exposed due to their occupation. We report herein a case of allergic contact dermatitis to aroma oils in an aroma therapist. A 25-year-old woman, an aroma therapist, had been treated with topical steroids under the impression of contact dermatitis. She had had pruritic erythematous maculopapules on the arms extending to the hands for the previous 6 months. Patch tests showed strong reactions to aroma oils(3% fennel and 3% juniper). The skin lesions were cleared after she stopped her job. However, re-exposure to aroma oils caused eczematous lesions repeatedly at the sites previously involved. We predict that increasing popularity of aromatherapy will lead to increasing number of patients developing allergic contact dermatitis from aroma oils. This has to be taken into consideration when testing patients with suspected contact dermatitis.
Adult ; Arm ; Aromatherapy ; Dermatitis, Allergic Contact* ; Dermatitis, Contact ; Female ; Foeniculum ; Hand ; Humans ; Oils ; Patch Tests ; Skin ; Steroids

No abstract available.
Aged* ; Humans ; Nursing Homes* ; Nursing*

2 Cases of primary lymphoma of brain are reported with brief review of literatures. Preoperative CT scans were performed and the correct diagnoses were made by operative biopsy. Initially the tumor masses were located in the periventricular white matter, in both cases. CT scans showed slightly high density areas with homogenous contrast enhancement. After local irradiation, these lesions disappeared completely. But soon after, well circumscribed homogenous contrast enhancing mass lesions recurred in the cerebellum.
Biopsy ; Brain ; Cerebellum ; Diagnosis ; Lymphoma ; Tomography, X-Ray Computed ; White Matter

No abstract available.
Candidiasis* ; Humans ; Infant, Newborn ; Infant, Premature*

No abstract available.
Humans

Primitive neuroectodermal tumors (PNET) of the ovary are rare tumors with an exclusive or almost exclusive malignant neuroectodermal composition, and are generally regarded as a monodermal expression of an ovarian teratoma. The tumors are basically identical with the lesions of the same name occuring typically in the central nervous system of children. These tumors consist chiefly of undifferentiated small cells resembling neuroblasts. There are also mature, well- differentiated neuroectodermal cells, such as astrocytes and ependymal cells. We report a case of ovarian PNET with glial and neuroblastic differentiation and focal teratomatous foci of non-neural tissue in a 17-year-old female.
Adolescent ; Astrocytes ; Central Nervous System ; Child ; Female ; Humans ; Neural Plate ; Neuroectodermal Tumors, Primitive* ; Ovary* ; Teratoma

Pleomorphic adenoma presenting as primary lesion of the bronchus is very rarely encountered, and in our knowledge only 6 cases have been reported in the literature of the western world, and no case report has been published in Korea. Currently, we experienced a case of bronchial pleomorphic adenoma occuring in a 38 years old woman. On X-ray examination, hazy density in the right upper lobe and emphysematous change in the right lower lobe were noted. A right pneumonectomy was done under bronchoscopic diagnosis of bronchial adeoma. The pathologic examination of the present case showed a polypoid endobronchial tumor, 1.4 x 1.1 cm (with extraluminal portion, 2.2 x 1.7 cm) in the right upper bronchus. The microscopic examination revealed a pleomorphic adenoma showing same morphology as those found in the salivary gland. This case, therefore, was believed to be a genuine example of bronchial pleomorphic adenoma of salivary gland type. We compared this case with 6 cases in the literature.
Female ; Humans ; Adenoma

PURPOSE AND BACKGROUND: Recently several clinical studies suggested that maternal treatment with magnesium sulfate had protective effects against cerebral palsy in premature infants. But previous studies with differing perinatal animal models resulted in inconclusive results with regard to magnesium neuroprotection. Our purpose was to study the neuroprotective effect of magnesium sulfate and optimal dosage on hypoxicischemic brain damage in the newborn rat. METHOD: Seven-day-old rats(n=68) underwent right carotid ligation, followed by 3 hours of hypoxia(8% oxygen in 92% nitrogen). Rats received magnesium sulfate immediately before and again after hypoxia(two doses, 150mg-600mg/kg/dose, n=39), or saline solution(n=29). Severity of injury was assessed 5 days later, by visual evaluation of ipsilateral hemisphere infarction and by measurement of bilateral hemispheric cross sectional areas. RESULTS: Magnesium sulfate pre-treatment reduced the incidence of liquefactive cerebral infarction and atrophy from 80.8% in controls to 22.2% with magnesium sulfate(450 mg/kg/dose, P<0.05). Quantitation of hemispheric areas confirmed these findings. Percent protection based on inter-hemisphere area differences by pre-treatment with magnesium sulfate 450mg/kg/dose ranged from 71.1%(hippocampus) to 90.8%(striatum). However higher dose of magnesium(600mg/kg/dose) did not attenuate hypoxic-ischemic brain injury in the newborn rat but increased mortality. CONCLUSION: Pretreatment of magnesium sulfate has neuroprotective effects against hypoxia-ischemia in the newborn rat and adequate dose of magnesium sufate is important to protect the brain. Magnesium pretreatment may be an effective strategy to decrease the severity of neonatal hypoxic-ischemic brain injury in the adequate dose.
Animals ; Atrophy ; Brain ; Brain Injuries ; Cerebral Infarction ; Cerebral Palsy ; Humans ; Incidence ; Infant, Newborn* ; Infant, Premature ; Infarction ; Ligation ; Magnesium Sulfate* ; Magnesium* ; Models, Animal ; Mortality ; Neuroprotective Agents* ; Oxygen ; Rats*

Intracranial vasculitis is a rare and disastrous complication of tuberculous meningitis if not treated properly. Focal neurologic deficits according to the vessels involved are common manifestation. Here, we report a 29-year-old man who suffered abrupt, bizarre behavioral changes caused by vasculitis complicating tuberculous meningoencephalitis. The diagnosis of tuberculous meningitis is based upon both the CSF findings and a chest X-ray. His systemic symptoms disappeared by after being administered antituberculous medication but various psychotic features such as hypersomnia, hyperphagia and aggressivebehavior continued. A brain MRI showed multiple small parenchymal tuberculous nodules, and the brain MR angiography revealed a narrowing of the proimal middle cerebral arteries and a reduced visualization of the cerebral vessels, suggesting widespread vasculitis. Intravenous dexamethasone successfully ameliorated his behavioral changes. In addition both the follow up brain MRI and angiography showed a normalization of the previous findings.
Adult ; Angiography ; Brain ; Dexamethasone ; Diagnosis ; Disorders of Excessive Somnolence ; Follow-Up Studies ; Humans ; Hyperphagia ; Magnetic Resonance Imaging ; Meningoencephalitis* ; Middle Cerebral Artery ; Neurologic Manifestations ; Thorax ; Tuberculosis ; Tuberculosis, Meningeal ; Vasculitis