No abstract available.

Port-wine stains (PWSs) are benign congenital vascular malformations that most commonly occur as isolated lesions on the face, neck and trunk. The major indication for therapy in most patient, regardless of age, is psychological burden imposed by the PWSs. A Candela SPTL-1 flashlamp-pumped pulsed dy laser (Candela Corp. Wayland, Mass.) using the principle of selective photothermolysis was used. Selective cutaneous vascular damages are influenced by the wavelength. pulse duration and energy density of the laser. To evaluate histopathological changes according to energy densities are essential to treat cutaneous benign vascular lesion by the iaser. 5 patients with PWSs were treated with the Candela SPTL-1 laser. Lesions were biopsied and analized immediately after laser exposure. 2 days and 7 days after laser exposure. The results were as follows : 1. Depth of penetration The penetration depth was increased from .2mm to 1.9mm with energies ranging from 6J/cm(2) to 10J/cm(2) respectively. 2. Nonvascular damages of epidermis & dermis Focal epidermal vacuolization has been observed in biopsy specimens immediately after laser exposure with energy density 6J/cm(2). As energy densities increased from 6J/cm(2) to 10J/cm(2), histopathological changes got worsened with appearance of vesicles. subepi dermal seperations and epidermal necrosis. 2. Vascular damages of dermis Multiple foci of agglutinated RBC, fibrin and platelet thrombi within the dermal blood vessels have been observed in biopsy specimens immediately after laser exposure. There was a pattern of "acute vasculitis" in the upper dermis and a prominent perivascular neutrophilic responses in the mid-dermis 2 days after laser exposure. Dermal vessels with smaller lumen and granulation tissue have been observed in biopy specimens 7 days after laser exposure. In summary, penetration depth of laser beam and nonvascular epidermal and dermal damages were directly proportional ot the energy density of the laser. But 7 days after laser exposure, epidermis and dermis showed normal appearance without detectable scarring. This study suggested that Candela SPTL-1 laser is safe and has no scar formation on the treatment of PWSs.
Biopsy ; Blood Platelets ; Blood Vessels ; Cicatrix ; Dermis ; Epidermis ; Fibrin ; Granulation Tissue ; Humans ; Neck ; Necrosis ; Neutrophils ; Port-Wine Stain* ; Vascular Malformations

No abstract available.

No abstract available.
Dermatitis, Atopic*

No abstract available.
Humans ; Infant, Newborn* ; Microbubbles*

A congenital salivary gland tumor, sialoblastoma, is extremely rare. A sialoblastoma of the parotid gland, occurring in a 28-week old fetus, is described. The histologic, immunohistochemical, and ultrastructural features of this tumor were studied. The tumor was characterized by solid nests or sheets of tumor cells intermingled with ductal structures lined by a columnar cells. Some of the tumor cells showed squamous differentiation. Immunohistochemically, these epidermoid cells reacted positively with anti-cytokeratin. But anti-S-100, anti- vimentin, anti-smooth muscle actin, anti-GFAP positive cells were not found. The ultrastructure was characterized by primitive epithelial cells. Although various names have been proposed, we favored the term "sialoblastoma". The histogenesis of this tumor is also discussed.
Actins ; Epithelial Cells ; Fetus ; Parotid Gland ; Salivary Glands ; Vimentin

This study was undertaken to investigate the optimal conditions for challenge testing with DNCB in 3 vehicles applied to guinea pigs in standardized amount/ area (pg/cm2) The results are sumrnarized as follows: 1) All test reactions were negative when tested in 10 unsensitized animals. 2) There were significant difference in positive rate between 0. 05%, DNCB in alcohol and 0.1% DNCB in alcohol, but there were no significant difference between 0. l%, DNCB in alcohol and 0, 2% DNCB in alcohol. Same results were obtaincd when DNCR was dissolved in acetone. 3) Acetone gives the significantly higher degree of positive reactions, indicating that alcohol may be the safer vehicle in eliciting a response than acetone. 4) With DNCB in olive oil, relatively few animals reacted compared to the results obtained with alcohol and acetone. Furthermore, olive oil is slippery and difficult to utilize when attempting to delineate surface area. 5) With alcohol, we obtained a good correlation between the amount applied and the resulting response, showing that this vehicle might be a superior vehicle in eliciting contact allergy.
Acetone ; Animals ; Dinitrochlorobenzene* ; Guinea Pigs* ; Guinea* ; Hypersensitivity* ; Olea ; Olive Oil

During evaluation of follow-up curettage of endometrial hyperplasia after progesterone treatment, we have noticed that the foci of squamous or morular metaplasia are persistent or even markedly increased after the hyperplastic glands have all disappeared. These observations have led us to study the histological changes of squamous or morular metaplasia in the hyperplastic endometrium after progesterone treatment and to examine the changes of estrogen receptors(ER) and progesterone receptors(PR) to find out, if there is any pathogenetic role of progesterone administration on the squamous or morular metaplasia. Squamous or morular metaplasia was associated in 21 cases (13.5 %) out of 156 endometrial hyperplasia during the study periods and all of them were associated with complex hyperplasia, but not associated with simple hyperplasia. At follow-up curettage after progesterone treatment, squamous metaplasia newly appeared in 3 cases(20 %), markedly increased in 4 cases(26.7%), persisted in 4 cases(26.7%) and decreased in 4 cases(26.7%), even after hyperplastic glands have all disappeared or were markedly decreased. On immunohistochemical staining, metaplastic foci showed ER- and PR- in 13 cases (87 %) in contrast to the surrounding endometrium and the remaining 2 cases showed minimal ER+ and PR+ confined to several nuclei. Intensity or staining pattern of ER and PR in metaplastic foci were not changed with progesterone treatment. In the background endometrium, intensity of glandular ER+ and PR + was higher than that of the stroma at the initial curettage, however, progesterone treatment predominantly down-regulated glandular ER+ more than stromal ER+. Increment or persistence of squamous metaplasia along the progesterone treatment seemingly would implicate hormonal influences as playing a significant role in the formation of squamous or morular metaplasia and the absence of cellular receptors for these hormones in the metaplastic foci may suggest qualitative changes in the receptors.

Formaldehyde and its derivatives are used to improve the wet strength, waterresistance, shrink-resistance, grease-resistance and other characteristics of paper and. paper products. We have recently analyzed 78 different kinds of paper sources which are being used in Korea by the lutidine method. The forma.ldehyde concentrations of the most paper sources were under 50 ug/gm ranges except 4 copying paper sources which were in the 50 to 100 ug/gm ranges.
Formaldehyde* ; Korea

This study was done to compare the nutritional status of antioxidant vitamins between college women smokers and nonsmokers. Dietary intakes and serum levels of antioxidant vitamins were determined in 33 smokers and 42 nonsmokers residing in the Seoul area. Dietary intakes of vitamin A and C were determined by a quick and convenient dietary intake method. Serum vitamin C level was measured by 2,4-dinitrophenylhydrazine method and serum levels of vitamin A and E were measured by HPLC. The mean A intake of nonsmokers and smokers was 504.3 microgram R.E./day and 450. 4 microgram R.E./day and the mean vitamic C intake of nonsmokers and smokers was 51.6mg/day and 50.2mg/day, reapectively. There was no difference in the dietary intakes of antioxidant vitamins between smokers and nonsmokers. The serum vitamin A level, 0.71mg/1 in nonsmokers was not significantly different from that of 0.74mg/1 in smokers. However, the serum vitamin C level, 7.94mg/1 in smokers was 15% lower(p<0.05) than that of 9.30mg/1 in nonsmokers. The serum vitamin E level, 18.15mg/1 in smoders was also 34% lower(p<0.05) than that of 27.58mg/1 in nonsmokers. There was no significant correlation between dietary intakes and serum levels of vitamin A and C for both smokers and nonsmokers. These results suggest that cigarette smokers need more dietary intakes of vitamin C and E than do nonsmokers to reach the same serum level.
Ascorbic Acid ; Chromatography, High Pressure Liquid ; Female ; Humans ; Nutritional Status* ; Seoul ; Tobacco Products ; Vitamin A ; Vitamin E ; Vitamins*