No abstract available.
Fibroma*

DNA isolated from human tumor cells can induce malignant transfarmation of tissue culture cells. The DNA is then called an oncogene. Its protein produets have been detected in animal and human tumors and are considered to play a significant role in carcinogenesis. In order to evaluate whether the oncogenes are involved in development of tumors of epidermis and whether they could be used as tumor markers, immunoperoxidase staining was performed for the ras product in sections of squamous cell carcinoma, Bowen's disease, actinic keratosis, keratoacanthoma and seborrheic keratosis. Three cases of sgamous cell carcinoma showed 10~20 positive cells per high power field(HPF). Three cases of Bowen's disease revealed 1-9 positive cells per HPF, whereas the actinic keratosis 1~9 or no positive cells per 10 HPF in all three cases. The keratoacanthoma and seborrheic keratosis showed 1~9 or no positive cells in all observed cases. The positive staining was observed in the cytoplasm. The increasing positivity in parallel with the increase of malignant potential strongly suggests that the ras oncogene is closely related to development of epidermal malignancy and also point out the possibility of ras as a cancer marker.
Animals ; Bowen's Disease ; Carcinogenesis ; Carcinoma, Squamous Cell ; Cytoplasm ; DNA ; Epidermis* ; Genes, ras* ; Humans ; Keratoacanthoma ; Keratosis, Actinic ; Keratosis, Seborrheic ; Oncogenes ; Biomarkers, Tumor

No abstract available.
Thanatophoric Dysplasia*

OBJECTIVES: The purposes of this study were to estimate the effect of mandibular advancement device (MAD) and to evaluate the influence of the advancement amount of mandible in the application of MAD for obstructive sleep apnea (OSA) patients. METHODS: From the patients who were diagnosed as OSA by polysomnographic study at Seoul National University Bundang Hospital from January 2007 to February 2009, the patients who chose MAD as treatment option were included in this study. All the patients' data including clinical records and polysomnographic studies (both pre- and post-treatment) were reviewed and analyzed. RESULTS: Successful results were obtained in 65 patients of 86 patients (75.6%). In the follow-up period, mild discomfort of anterior teeth or temporomandibular joint (TMJ) were described in 28 patients, especially in the cases the amount of mandibular advancement were more than 7.0 mm. There was no direct relationship between the amount of mandibular advancement and clinical outcome. CONCLUSION: MAD was effective treatment option for the OSA patients regardless of severity. For the prevention of potential dental complications, the amount of mandibular advancement should be considered at the time of MAD treatment.
Adenine Nucleotides ; Follow-Up Studies ; Humans ; Mandible ; Mandibular Advancement ; Mycophenolic Acid ; Sleep Apnea, Obstructive ; Temporomandibular Joint ; Tooth

No abstract available.
Pregnancy*

PURPOSE: Abdominal CT scans in patients with intraperitoneal fluid were retrospectively studied to identify characteristic features useful for differential diagnosis of various causes. MATERIALS AND METHODS: One hundred and seventy patients with intraperitoneal fluid collection were classified as categories of hepatic disease, carcinomatosis, and infectious disease. We analyzed sites of fluid collection, the presence of peritoneal thickening, omental and mesenteric fat infiltration, and lymph node enlargment. RESULTS: Intraperitoneal fluid was present in subhepatic space, subphrenic space, paracolic gutter, mesentery, and fossa of the gallbladder in decreasing order of frequency. Fluid in the gallbladder fossa was the most frequent in hepatic diseases. The fluid collection in subhepatic and subphrenic space was less frequent in infectious diseases. Peritoneal thickening was noted in infectious diseases, and carcinomatosis. Omental fat infiltration and enlarged lymph nodes were the most frequent in carcinomatosis (58% and 44%, respectively), whereas, mesenteric fat infiltration and enlarged lymph nodes were the most common in infectious diseases (61%, and 26%, respectively). CONCLUSION: The location of peritoneal fluid collection showed some lesion specific characteristics, and CT features of fat infiltration and enlarged lymph nodes of peritoneum, omentum, and mesentery were helpful for differential diagnosis between carcinomatosis and infectious diseases.
Ascitic Fluid ; Carcinoma ; Communicable Diseases ; Diagnosis, Differential ; Gallbladder ; Humans ; Lymph Nodes ; Mesentery ; Omentum ; Peritoneum ; Retrospective Studies ; Tomography, X-Ray Computed

Studies on epidemiological aspects of contact dermatitis have been published in recent years since the introduction of standardized method of patch test.However, most previous epidemiologic reports studied patients with allergic contact dermatitis in hospitals with patcb testing. Such data are not directly applicable to the population at large. Very recentiy there are a few reports ahout rates of exposure and patch test reactivity to certain antigens in a general population. which is difficult to be applicable in a developing country at present. With regard to this, we have tried to analyze the contact dermatitis questionaire containing various items of common causative agents producting contact dermatitis (for example, metals, cosmetics, plants, medicaments and rubber etc.) for the detection of past contact dermatitis histories in a total new dermatologic outpatients. A11 2258 dermatologic outpatients entered this study including 303 contact dermatitis patients (allergic contact dermatitis, primary irritant dermatitis and housewife eczema). We also analyzed the patch test results of 107 patients with suggesting contact dermatitis who visited our hospital at the same period of collecting questionaires. The study results were as follows. 1. Positive rate of each item of the questionaire (No. of said Yes/ No. of responders) was metals, 10.4% cosmetics, 31.8%, plants, 18.2%; medicaments, 12.4%; rubber, 5.8%; and others, 11.7%. 2. The most common all regens of the patch test positive reactions were nickel sulfate (9.3%), fragrance mix(9.3%), formaldehyde(6.5%), potassium dichromate (5.6%), neomycin sulfate (5.6%), balsam of Peru (4.7%), cobalt chloride(3.7%), wood tar(3.7%) and paraphenylene diamine (2.8%) in order of frequency. And the patch test positive rate of commercial cosmetic products was 10.3%. In conclusion, cosmetics, medicaments, metals, plants and rarely rubber are found the most common etiologic agents of contact dermatitis in this study. The reasons and back-ground of the results were also discussed in various aspects.
Cobalt ; Dermatitis, Allergic Contact ; Dermatitis, Contact* ; Dermatitis, Irritant ; Developing Countries ; Epidemiologic Studies* ; Humans ; Metals ; Neomycin ; Nickel ; Outpatients ; Patch Tests ; Peru ; Potassium Dichromate ; Rubber ; Wood

Cancer tissues are characterized by increased glucose uptake. 18F-fluorodeoxyglucose(FDG), a glucose analogue is used for the diagnosis of cancer in PET studies. This study was aimed to compare the glucose uptake and glucose transporter l(GLUT1) expression in various human colon cancer cells. We measured FDG uptake by cell retention study and expression of GLUTI using Western blotting. Human colon cancer cells, SNU-C2A, SNU-C4 and SNU-C5, were used. The cells were incubated with 1micro Ci/ml of FDG in HEPES-buffered saline for one hour. The FDG uptake of SNU-C2A,SNU-C4 and SNU-C5 were 16.8+/-1.36, 12.3+/-5.55 and 61.0+/-2.17cpm/microgram of protein, respectively. Dose-response and time-course studies represent that FDG uptake of cancer cells were dose dependent and time dependent. The rate of FDG uptake of SNU-C2A, SNU-C4 and SNU-C5 were 0.29+/-0.03, 0.21+/-0.09 and 1.07+/-0.07cpm/min/microgram of protein, respectively. Western blot analysis showed that the GLUT1 expression of SNU-C5 was significantly higher than those of SNU-C2A and SNU-C4. These results represent that FDG uptake into human colon cancer cells are different from each other. In addition, FDG uptake and expression of CLUT1 are closely related in human colon cancer cells.
Blotting, Western ; Colon* ; Colonic Neoplasms* ; Diagnosis ; Glucose ; Glucose Transport Proteins, Facilitative ; Humans*

The influence of vitamin A acetate on the induction of bladder carcinogenesis by N-butyl-N-(4- hydroxybutyl) nitrosamine(BBN) was studied in male Wistar rats. Animals were divided into 4 groups : Group I and II received BBN and/or vitamin A acetate for 12 and 20 weeks. respectively. Group I and II were further divided into 3 subgroups : Subgroup a received BBN only, subgroup b BBN and vitamin A acetate in 100 IU per gram diet and subgroup c BBN and vitamin A acetate in 200 IU per gram diet, respectively. Group E received only vitamin A acetate and Group IV only basal diet. Animals were killed at 20 weeks after first carcinogen exposure and bladder was examined by both light and electron microscopy. At the two dose levels. vitamin A acetate significantly reduced the incidence and extent of carcinoma in Group I, as well as in Group X Vitamin A acetate of lower and higher dosage were nearly same in the inhibitory effect of development of carcinoma. Vitamin A acetate did not reduce the incidence of papilloma, but reduced the extent of papilloma in group I significantly. Vitamin A acetate also reduced the incidence of high grade neoplasm and deeply invasive cancer. Hypervitaminosis A did not develop at both lower and higher dosage of vitamin A acetate. Cancer cells in animals which received both vitamin A acetate and BShl often showed cytolysis, pyknosis and disruption of cellular membrane. The present findings indicate that vitamin A acetate inhibits or delays the development of bladder carcinoma without significant toxicity.
Animals ; Carcinogenesis* ; Diet ; Humans ; Hypervitaminosis A ; Incidence ; Male ; Membranes ; Microscopy, Electron ; Papilloma ; Rats* ; Rats, Wistar ; Urinary Bladder Neoplasms ; Urinary Bladder* ; Vitamin A* ; Vitamins*

No abstract available.
Allopurinol* ; Alprostadil* ; Skin*