The aim of the present study is to demonstrate the usefulness of intraoperative fine needle aspiration (FNA) of pancreatic lesions in 30 patients. A conclusive diagnosis was done in 27 patients and the diagnoses of three patients were deferred. No complications followed the procedure. Based on histologic findings of the resected specimens in 20 cases and of cell blocks in 10 cases, the final diagnoses were adenocarcinoma in 19 cases, chronic pancreatitis in nine cases and tuberculosis in two cases. The sensitivity, specificity and diagnostic accuracy were 95%, 100% and 96% resepectively and there were no false positives. The smear of aspirate was stained with toluidine blue and examined by light microscope. The presence of there-dimensional clusters of disoriented cells and the increased nuclear/cytoplasmic ratio with large prominent nucleoli were the most helpful criteria for a diagnosis of malignancy in the pancreas. The intraoperative FNA of pancreatic lesions was considered as a simple, safe, and highly specific and sensitive tool in differentiating benign from malignant lesions. The intraoperative FNA can be recommended as the first tool of choice of intraoperative diagnostic procedure in lesions of the pancreas.
Child ; Male ; Female ; Humans ; Adenocarcinoma

Hantaan virus is widely distributed among rodent populations in Korea. Two antigenically distinct hantaviruses were isolated from Apodemus agrarius in 1976 and Rattus norvegicus in 1980 in Korea. This study was designed to investigate the serological evidence of hantavirus infection among indegenous wild rodents, which were captured in 11 mountains located in Kyunggi, Kangwon, Chungnan, Chunbug and Kyungnam province of South Korea. A total 252 wild rodents of 3 species were trapped from Myungsung Mt., Chumbong Mt., Kali Mt., Hansuk Mt., Chachil peak, Kyebang Mt., Odae Mt., Kyerong Mt., Kaya Mt., Togju Mt. and Chiri Mt. in 1997. Serologic test for hantavirus infection was performed using hantavirus antigens by indirect immunofluorescent antibody technique. Among 122 Apodemus agrarius, 88 Apodemus peninsulae and 42 Eothenomys regulus; 18 A. agrarius (14.8%), 12 A. peninsulae (13.6%) and 4 E. regulus (9.5%) were immunofluorescent antibody (IFA) positive against hantaan virus. IFA titers 3 Eothenomys regulus sera were higher against puumalavirus than hantaan virus. These data imply that above three species of rodent might be natural reservoirs of hantaviruses in Korea.
Animals ; Gangwon-do ; Gyeonggi-do ; Gyeongsangnam-do ; Hantaan virus ; Hantavirus Infections* ; Hantavirus* ; Korea* ; Murinae ; Rats ; Rodentia ; Seroepidemiologic Studies* ; Serologic Tests

A 31-year-old male with severe limitation of mouth opening was referred to our department of Chonbuk National University Hospital. The physical status of the patient was hyposthenic. Extraoral examination showed no condylar movement of the both temporomandibular joints, no pain, no faical swelling or paresthesia. Intraoral examination showed several cervical caries on the upper anterior teeth, and gingival swelling on the whole dentition. Transcranial view showed no condylar movement, and narrowing of joint spaces. Chest P-A view showed straightening of thoracic, lumbar spine, and squaring of vertebrae of the same spines. Conventional lateral radiograph of cervical spine showed calcification of the intervertebral ligament. Computed tomograph showed extensive bone formation between temporal bone and the both condylar heads. Labortory findings showed positive reaction on HLA-B27 histocompatibility antigen and increased level of IgA, IgG, ESR. Based on the clinical, radiographic, and the labortary findings, final diagnosis was made as bony ankylosis of the both temporomandibular joints secondary to ankylosing spondylitis.
Adult ; Ankylosis* ; Dentition ; Diagnosis ; Head ; Histocompatibility Antigens ; HLA-B27 Antigen ; Humans ; Immunoglobulin A ; Immunoglobulin G ; Jeollabuk-do ; Joints ; Ligaments ; Male ; Mouth ; Osteogenesis ; Paresthesia ; Root Caries ; Spine ; Spondylitis, Ankylosing* ; Temporal Bone ; Temporomandibular Joint* ; Thorax ; Tooth

PURPOSE: The aims of the present study are to determine the optimum compression rate in terms of file size reduction and diagnostic quality of the images after compression and evaluate the transmission speed of original or each compressed images. MATERIALS AND METHODS: The material consisted of 24 extracted human premolars and molars. The occlusal surfaces and proximal surfaces of the teeth had a clinical disease spectrum that ranged from sound to varying degrees of fissure discoloration and cavitation. The images from Digora system were exported in TIFF and the images from conventional intraoral film were scanned and digitalized in TIFF by Nikon SF-200 scanner(Nikon, Japan). And six compression factors were chosen and applied on the basis of the results from a pilot study. The total number of images to be assessed were 336. Three radiologists assessed the occlusal and proximal surfaces of the teeth with 5-rank scale. Finally diagnosed as either sound or carious lesion by one expert oral pathologist. And sensitivity and specificity and kappa value for diagnostic agreement was calculated. Also the area(Az) values under the ROC curve were calculated and paired t-test and oneway ANOVA test was performed. Thereafter, transmission time of the image files of the each compression level were compared with that of the original image files. RESULTS: No significant difference was found between original and the corresponding images up to 7%(1:14) compression ratio for both the occlusal and proximal caries(p<0.05). JPEG3(1:14) image files are transmitted fast more than 10 times, maintained diagnostic information in image, compared with original image files. CONCLUSON: 1:14 compressed image file may be used instead of the original image and reduce storage needs and transmission time.
Bicuspid ; Data Compression* ; Humans ; Molar ; Pilot Projects ; Radiography, Dental, Digital ; ROC Curve ; Sensitivity and Specificity ; Tooth

PURPOSE: To assess bone changes of mandibular condyle using cone beam computed tomography (CBCT) in temporomandibular disorder (TMD) patients. MATERIALS AND METHODS: 314 temporomandibular joints (TMJs) images of 163 TMD patients were examined at the Department of Oral and Maxillofacial Radiology, Chonbuk National University. The images were obtained by PSR9000N (Asahi Roentgen Co., Japan) and reconstructed by using Asahivision software (Asahi Roentgen Co., Japan). The CBCT images were examined three times with four weeks interval by three radiologists. Bone changes of mandibular condyle such as flattening, sclerosis, erosion and osteophyte formation were observed in sagittal, axial, coronal and 3 dimensional images of the mandibular condyle. The statistical analysis was performed using SPSS 12.0. Intra- and interobserver agreement were performed by 3 radiologists without the knowledge of clinical information. RESULTS: Osteophyte (2.9%) was found more frequently on anterior surface of the mandibular condyle. Erosion (31.8%) was found more frequently on anterior and medial surfaces of the mandibular condyle. The intraobserver agreement was good to excellent (k=0.78-0.84), but interobserver agreement was fair (k=0.45). CONCLUSION: CBCT can provide high qualified images of bone changes of the TMJ with axial, coronal and 3 dimensional images.
Cone-Beam Computed Tomography* ; Humans ; Jeollabuk-do ; Mandibular Condyle* ; Osteophyte ; Sclerosis ; Temporomandibular Joint ; Temporomandibular Joint Disorders

Peripheral ameloblastoma is an extremely rare odontogenic soft tissue tumor with histologic characteristics similar to those of the intraosseous ameloblastoma. It appears in the gingiva and oral mucosa. And it usually does not show any bone involvement on radiographs, except for saucer shaped erosion of underlying alveolar bone. Recurrence is considered uncommon. We report a case of peripheral ameloblastoma with bone involvement. Histologically it presented with follicles and nest of tumor cells with palisading pattern. And radiographs showed the typical saucer shaped alveolar bone erosion at the distal area of right mandibular third molar. At 6-month follow-up after operation, no local recurrence was noted.
Ameloblastoma* ; Follow-Up Studies ; Gingiva ; Molar, Third ; Mouth Mucosa ; Recurrence

No abstract available.
Administration, Oral ; Aged ; Anti-Bacterial Agents/*administration & dosage ; Bone Diseases, Infectious/diagnosis/*drug therapy/microbiology ; Drug Therapy, Combination ; Female ; Hospitals, University ; Humans ; Joint Diseases/diagnosis/*drug therapy/microbiology ; Male ; Microbial Sensitivity Tests ; Middle Aged ; Republic of Korea ; Staphylococcal Infections/diagnosis/*drug therapy/microbiology ; Staphylococcus aureus/*drug effects/isolation & purification ; Treatment Outcome

PURPOSE: The expression of Nitric oxide Synthase (NOS) and aquaporin (AQP) water channels in rat bladder is recently reported. The aim of this study is to evaluate the expression of inducible NOS (iNOS), aquaporin-3 (AQP-3) in cyclophosphamide (CYP) induced rat bladder. MATERIALS AND METHODS: The 32 Sprague-Dawley rats were divided into cystitis group (n=20) and control group (n=12). In cystitis group, 100mg/kg CYP was injected every second day for 1 week whereas in control group, normal saline was injected. After extracting of the bladder and dividing dome, body and trigone of the bladder, independently H&E staining and immunohistochemical staining for iNOS and AQP-3 were performed. Expressions of iNOS and AQP-3 were analyzed with a confocal laser scanning microscope and an image analyzer. RESULTS: The expression of iNOS significantly increased in the mucosa, submucosa layer of dome in cystitis group (p<0.05). The expression of AQP-3 significantly increased in the mucosa, submucosa, vessel layer of dome in cystitis group (p<0.05). CONCLUSIONS: These results suggest that inflammatory change activates NOS and AQP-3 expression in the bladder tissue of rats. These may imply that NOS and AQP-3 have a pathophyiological role in the cyclophophamide induced interstitial cystitis. Further study on the NOS and AQP-3 in bladder is needed for clinical application.
Animals ; Aquaporins ; Cyclophosphamide ; Cystitis ; Cystitis, Interstitial ; Glycosaminoglycans ; Mucous Membrane ; Nitric Oxide ; Nitric Oxide Synthase ; Rats ; Rats, Sprague-Dawley ; Urinary Bladder

PURPOSE: To investigate the effects of irradiation on transforming growth factor beta1 (TGF-beta1) mRNA expression and calcific nodule formation in MC3T3-E1 osteoblastic cell line. MATERIALS AND METHODS: Cells were cultured in alpha-minimum essential medium (alpha-MEM) supplemented with 10% fetal bovine serum and antibiotics. When the cells reached the level of 70-80% confluence, culture media were changed with alpha-MEM supplemented with 10% FBS, 5 mM beta-glycerol phosphate, and 50 microgram/mL ascorbic acid. Thereafter the cells were irradiated with a single dose of 2, 4, 6, 8 Gy at a dose rate of 1.5 Gy/min. The expression pattern of TGF-beta1 mRNA, calcium content and calcific nodule formation were examined on day 3, 7, 14, 21, 28, respectively, after the irradiation. RESULTS: The amount of TGF-beta1 mRNA expression decreased significantly on day 7 after irradiation of 4, 6, 8 Gy. It also decreased on day 14 after irradiation of 6, 8 Gy, and decreased on day 21 after irradiation of 8 Gy. The amount of calcium deposition decreased significantly on day 7 after irradiation of 4, 8 Gy (P.0.01) and showed a decreased tendency on day 14, 21 after irradiation of 4, 6, 8 Gy. The number of calcific nodules was decreased on day 7 after irradiation of 4, 8 Gy. CONCLUSION: Irradiation with a single dose of 4, 6, 8 Gy influences negatively the bone formation at the molecular level by affecting the TGF-beta1 mRNA expression that was associated with proliferation and the production of extracellular matrix in MC3T3-E1 osteoblastic cell line.
Anti-Bacterial Agents ; Ascorbic Acid ; Calcium ; Cell Line ; Culture Media ; Extracellular Matrix ; Glycerophosphates ; Organic Chemicals ; Osteoblasts ; Osteogenesis ; RNA, Messenger ; Transforming Growth Factor beta1

PURPOSE: Studies conducted on both animal and adult human subjects have demonstrated that a decrease in cerebral blood flow (CBF) causes cerebrocortical dysfunction resulting in an abnormal electroencephalogram (EEG). Although it is assumed that in premature infants with patent ductus arteriosus (PDA), the shunt will decrease CBF and alter the cerebrocortical function thus resulting in an abnormal EEG, this has yet to be firmly established. This comparative study, therefore, measures EEG as effected by CBF before and after PDA closures. Furthermore, in order to observe the effect of PDA on CBF and EEGs, the results were compared against a control group made up of premature infants without PDA. METHOD: All subjects were premature infants admitted to the neonatal intensive care unit of Chungbuk National University Hospital between February and August of 1997, were under gestational age (GA) 36 weeks, and weighed less than 2 kilograms: PDA group (group I consisted of 8 with PDA and respiratory distress syndrom (RDS); group II of 5 with PDA but without RDS) and Control group (group III of 6 without PDA but with RDS; group IV of 12 with neither PDA nor RDS). Studies were performed on the third and seventh day after birth and continued weekly throughout the period of study. Using Acuson 128XP/10c Doppler Echo cardiography, we measured the peak systolic velocity (PVS), the end-diastolic velocity (EDV) and the area under the velocity curve (AUVC) of the anterior cerebral artery (ACA), the blood flow of the left carotid artery and the descending aorta, calculated the LA/Ao ratio and conducted EEG's. RESULTS: 1) Birth weight and gestational age There was a significant difference between group I and group IV. However, when contrasting the two control groups overall, we found no significant variation. 2) In the PDA group, the infants were treated as follows: four infants were performed PDA ligations and seven were administrated indomethacine, resulting in 5 successful closures. Two infants had PDA which closed naturally without any treatment.3) PSV, DV, AUVC in the PDA group before and after closureThe incidence of decreased cerebral blood flow tended to increase after the PDA closure; however, the variation was not significant. In the groupes with RDS, on the other hand, the increase of CBF was significant after treatment, especially in group III.4) Incidence of abnormal EEGsThe preliminary EEG was abnormal for the above infants, with the background EEG appearing as suppressed or sharp and spike wave discharges. There was no significant difference in the results of the two groups and all EEG's were normalized in subsequent examinations. CONCLUSION: The decreased cerebral blood flow in premature infants with PDA increased following closure of the shunt; however, this increase was not significant. In groupes with RDS, the decreased cerebral blood flow significantly increased as the RDS improved, especially in group III. Nonetheless, despite the observed changes in CBF, we were unable to detect a corresponding change in the EEGs of the newborns in this study.
Adult ; Animals ; Anterior Cerebral Artery ; Aorta, Thoracic ; Birth Weight ; Carotid Arteries ; Chungcheongbuk-do ; Ductus Arteriosus, Patent ; Electroencephalography* ; Gestational Age ; Hand ; Humans ; Incidence ; Indomethacin ; Infant ; Infant, Newborn ; Infant, Premature* ; Intensive Care, Neonatal ; Ligation ; Parturition