ABSTRACT
PURPOSE: The objective of the present study was to predict the gestational age at preterm birth using artificial neural networks for singleton pregnancy. METHODS: Artificial neural networks (ANNs) were used as a tool for the prediction of gestational age at birth. ANNs trained using obstetrical data of 125 cases, including 56 preterm and 69 non-preterm deliveries. Using a 36-variable obstetrical input set, gestational weeks at delivery were predicted by 89 cases of training sets, 18 cases of validating sets, and 18 cases of testing sets (total: 125 cases). After training, we validated the model by another 12 cases containing data of preterm deliveries. RESULTS: To define the accuracy of the developed model, we confirmed the correlation coefficient (R) and mean square error of the model. For validating sets, the correlation coefficient was 0.839, but R of testing sets was 0.892, and R of total 125 cases was 0.959. The neural networks were well trained, and the model predictions were relatively good. Furthermore, the model was validated with another dataset of 12 cases, and the correlation coefficient was 0.709. The error days were 11.58±13.73. CONCLUSION: In the present study, we trained the ANNs and developed the predictive model for gestational age at delivery. Although the prediction for gestational age at birth in singleton preterm birth was feasible, further studies with larger data, including detailed risk variables of preterm birth and other obstetrical outcomes, are needed.
Subject(s)
Pregnancy , Dataset , Gestational Age , Parturition , Premature BirthABSTRACT
PURPOSE: The aim of this study was to propose the position of maxillary anterior teeth and intercanine width measurements based on the incisive papilla in accordance with the cephalic type and gender of dentate Korean adult with normal teeth alignment. MATERIALS AND METHODS: 42 students with Class I normal occlusion, without crowding or spacing, were selected from the Chonnam National University School of Dentistry. The lateral skull radiographs of the subjects were taken and were classified as different cephalic types, based on their PFH / AFH ratios. 42 casts of their maxilla were prepared and both the distance between the upper central incisors and the middle of the incisor papilla was measured with a vernier caliper (A) and the distance between the maxillary canine cusp tips (B) were measured. Statistical analysis was performed using SPSS version 15 and their significance was investigated. RESULTS: For dolichocephalic group, the mean values for A and B were 8.43 (SD: 0.61) and 36.73 (SD: 2.17), respectively. The mean value for A was 8.51 (SD: 1.27) for the mesocephalic group and 8.76 (SD 1.03) for the brachycephalic group. The mean value for B was 35.91 (SD: 1.86) for the mesocephalic group and 37.34 (SD: 2.23) for the brachycephalic group. For the male group, the mean A value was 8.86 (SD: 1.04) and the mean B value was 37.60 (SD: 0.24). For the female group, the mean A value was 8.41 (SD: 0.93) and the mean B value was 36.18 (SD: 2.01). The difference between male and female group in A values were not statistically significant (P>.05). The B values of the male subjects were greater than those of the female subjects and was statistically significant (P<.05). CONCLUSION: 42 students with normal dentition and occlusion in korea, the distance from the incisive papilla and the incisal edge of maxillary central incisors had no difference in cephalic type or gender. However, the distance between the cusp tip of both canines had significant difference in gender where the male showed higher values than the female, while having no difference in cephalic types.
Subject(s)
Adult , Female , Humans , Male , Crowding , Dentistry , Dentition , Denture, Complete , Incisor , Korea , Maxilla , Palate , Skull , ToothABSTRACT
PURPOSE: This study was undertaken to investigate in detail the xenograft mouse orthotopic lung cancer model induced by PC14PE6 adenocarcinoma cells. MATERIALS AND METHODS: Three cell doses (0.5x10(6); 1x10(6); 2x10(6)) of PC14PE6 cells were injected into the lungs of male BALB/c nude mice by the intrathoracic injection method. The lung and other organs, including brain, liver, spleen, kidney, muscle, adrenal gland, and lymph node on knee, were removed and stained with H/E to detect the presence of tumor cells. RESULTS: The reliable tumorigenicity time in the PC14PE6 adenocarcinoma cell-inoculated BALB/c nude mouse was 10 days after intrathoracic injection. The average life span of the three groups after inoculation was 14 days in the 2x10(6) cells inoculum group; 25 days in the 1x10(6) cells inoculum group; and 32 days in the 0.5x10(6) cells inoculum group. The PC14PE6 adenocarcinoma cells induced orthotopic lung cancer limited within the thorax. CONCLUSIONS: This orthotopic lung cancer model is an efficient cancer model with easy inoculation methods, rapid and high tumorigenicity, and simple monitoring methods for metastasis.
Subject(s)
Animals , Humans , Male , Mice , Adenocarcinoma , Adrenal Glands , Brain , Heterografts , Kidney , Knee , Liver , Lung Neoplasms , Lung , Lymph Nodes , Mice, Nude , Models, Animal , Neoplasm Metastasis , Spleen , ThoraxABSTRACT
Primary lymphoma of the urinary bladder is a rare non-epithelial bladder tumor accounting for less than 1% of all bladder tumors. Approximately 17 cases of MALT lymphomas of bladder have been reported in the literature. Most reported MALT lymphomas of bladder have a female sexual preponderance with a mean age of 58 years with common presenting symptoms of hematuria, dysuria and urinary frequency. The reported prognosis of MALT lymphoma of the urinary bladder is excellent. We report a case of MALT lymphoma of urinary bladder in a 57-year-old woman patient who presented with a two-year history of persistent dysuria and urinary frequency. An intravenous pyelogram and cystoscopy revealed a 1 cm focal elevated lesion at the base of urinary bladder. The tissue obtained by transurethral resection (TUR) showed plasma cell infiltration consistent with low grade marginal zone B cell lymphoma. The immunohistochemical studies showed an immunoglobulin restriction to lambda light chain while the nested polymerase chain reaction analysis of the tissue showed a monoclonal Ig heavy-chain gene rearrangement. The clinical staging protocol revealed that the tumor was primarily arising from the urinary bladder with no evidence of other site involvements. The patient received radiation therapy of 3060 cGy in 17 fractions.
Subject(s)
Female , Humans , Middle Aged , Cystoscopy , Dysuria , Gene Rearrangement , Hematuria , Immunoglobulins , Lymphoma , Lymphoma, B-Cell, Marginal Zone , Plasma Cells , Polymerase Chain Reaction , Prognosis , Urinary Bladder Neoplasms , Urinary BladderABSTRACT
Despite significant advances in obstetric and pediatric health care, Streptococcus agalactiae(Lancefield group B β-hemolytic Streptococcus, GBS) remains one 91 the most prevalent and devastating pathogens in peripartum women and their newborn infants. It may cause urinary tract infection, chorioamnionitis and endometritis, bacteremia, and cesarean wound infection in the peripartum period. It was Pasteur who first identified microbes in the blood and lorchia of septic women. After that, in 1938 the isolation of S. agalactiae from three mortally ill women was reported, thereby implicating it as another cause of puerperal sepsis. S. agalactiae is now one of the most common causes of neonatal sepsis and meningitis in the United States. However, in Korea there have been only twenty-three cases of neonatal meningitis and/or sepsis due to group B β-hemolytic streptococcus reported. Recent studies have noted other serious infections in adults, including bacteremia, pneumonia, cellulitis, osteomyelitis, meningitis, and endocarditis. In Korean adults no case of pneumonia due to S. agalactiae has been reported till now. As minimal inhibitory concentration of penicillin was reported to be higher for S. agalactiae than for S. pyogenes, minimal inhibitory concentration of penicillin for S. agalactiae should be tested. Herein we describe the course of a case of S. agalactiae pneumonia and bacteremia in a 74-year-old diabetic man, and we review the literatures.
Subject(s)
Adult , Aged , Female , Humans , Infant, Newborn , Pregnancy , Bacteremia , Cellulitis , Chorioamnionitis , Delivery of Health Care , Endocarditis , Endometritis , Korea , Meningitis , Osteomyelitis , Penicillins , Peripartum Period , Pneumonia , Sepsis , Streptococcus agalactiae , Streptococcus , United States , Urinary Tract Infections , Wound InfectionABSTRACT
Recently the incidence of colonic disease increases in Korea. Because a large proportion of polyps and cancer occur in the rectosigmoid colon, fecal occult blood test and sigmoidoscopy have been used widely in screening test. (continue...)
Subject(s)
Colon , Colonic Diseases , Colonic Neoplasms , Colonoscopy , Incidence , Korea , Mass Screening , Occult Blood , Polyps , SigmoidoscopyABSTRACT
No abstract available.