NK/T cell lymphoma is a distinct clinicopathologic entity which is more prevalent in Asia than in America and Europe and is highly associated with Epstein-Barr virus (EBV) infection. Although the clinicopathologic features of the tumor have been clearly defined, genetic changes and roles of virus associated with the development and progression of tumor have not been well studied. In this study, we carried out polymerase chain reaction (PCR) for EBNA-3B, EBNA-3C, and LMP-1 30 bp deletion to investigate EBV subtype and variants in tumor tissue and performed comparative genomic hybridization (CGH) to screen chromosomal imbalances using frozen tissues from 7 patients with nasal-type NK/T cell lymphoma and 1 patient with blastic NK cell lymphoma. Of 6 cases infected with EBV, there were EBV type 1 in six, LMP-1 30 bp deletion variant in four, and LMP-1 40 bp deletion variant in one. Frequent chromosomal imbalances included deletions at 1p31-pter (4), 12q23-q24 (3), and 17p (4), and gains at 2q (5), 10q (3), and 13q34-qter (4). Blastic NK cell lymphoma displayed deletions of 9q, 7q, and 6q, similar to that of nasal-type NK/T-cell lymphoma. With these results, we assumed that candidate genes in these imbalanced chromosomal loci would provide the clue for further molecular studies to identify putative tumor suppressor genes or proto-oncogenes associated with pathogenesis of this neoplasm.
Americas ; Asia ; Comparative Genomic Hybridization* ; Europe ; Genes, Tumor Suppressor ; Genotype* ; Herpesvirus 4, Human* ; Humans ; Killer Cells, Natural ; Lymphoma* ; Polymerase Chain Reaction ; Proto-Oncogenes

PURPOSE: Epstein-Barr virus(EBV) exists in the human population in two genetic forms, usually referred to as type 1 and type 2 which have been defined on the basis of sequence divergence in the EBNA-2 and EBNA-3 family genes. In this study, we were intended to investigate whether the subtypes of EBV in malignant lymphoma in Korea were associated with specific disease entities and geographical distribution. MATERIALS AND METHODS: Biopsy samples obtained from 18 Korean patients with malignant lymphoma including Hodgkin's disease(3 cases), B cell lymphoma(1 case), and NK/T cell lymphoma(14 cases) were analyzed to determine the subtype of EBV infected therein. DNA was extracted from formalin-fixed, paraffin-embeded tissues by ordinary method and specific viral sequences were sought using the polymerase chain reaction(PCR) and Southern blot hybridization assay. Oligonucleotide primers used for examination of EBV strain type were derived from the EBNA-3B and EBNA-3C coding regions. As a control, four cases of reactive hyperplasia were analyzed. RESULTS: The two of four reactive hyperplasia cases were associated with type 1 and the rest of two cases with both types. Among the 18 cases with malignant lymphoma, thirteen cases(72%) had type 1, one(6%) had type 2, and four(22%) had dual infections with both types. In case of NK/T cell lymphoma(14 cases) occupying 78% of 18 biopsy samples, 86%(12 cases) were associated with type 1, 7%(1 case) with type 2, and 7%(1 case) with both types. In case of Hodgkin's disease, all of three cases had both types. B cell lymphoma taking only one case of twenty two cases was determined as type 1. CONCLUSION: These observations indicated that type 1 EBV was predominant in Korean patients with malignant lymphoma, especially NK/T cell lymphoma and showed high frequency of dual viral infections(22%) in Hodgkin's disease as well as in reactive hyperplasia.
Biopsy ; Blotting, Southern ; Clinical Coding ; DNA ; DNA Primers ; Genotype ; Herpesvirus 4, Human ; Hodgkin Disease ; Humans ; Hyperplasia ; Korea* ; Lymphoma* ; Lymphoma, B-Cell

OBJECTIVE: To examine the synergistic effects of both computer-assisted cognitive rehabilitation (CACR) and transcranial direct current stimulation (tDCS) on cognitive function in patients with stroke. METHODS: The current double-blind, sham-controlled study enrolled a total of 11 patients who were newly diagnosed with stroke. The patients of the tDCS group (n=6) completed sessions of the Korean computer-assisted cognitive rehabilitation program five times a week for 30 minutes a session during a mean period of 18.5 days concomitantly with the anodal tDCS over the bilateral prefrontal cortex combined with the CACR. The patients of the control group (n=5) also completed sessions of the sham stimulation during a mean period of 17.8 days. Anodal tDCS over bilateral prefrontal cortex (F3 and F4 in 10-20 EEG system) was delivered for 30 minutes at an intensity of 2 mA. Cathode electrodes were applied to the non-dominant arm. All the patients were evaluated using the Seoul Computerized Neuropsychological Test (SCNT) and the Korean Mini-Mental State Examination. RESULTS: Mann-Whitney U test revealed a significant difference between the two groups. The patients of the tDCS group achieved a significant improvement in the post/pre ratio of auditory continuous performance test and visual continuous performance test on the SCNT items. CONCLUSION: Our results indicate that the concomitant use of the tDCS with CACR to the prefrontal cortex may provide additional beneficial effects in improving the cognitive dysfunction for patients with stroke.
Arm ; Electrodes ; Electroencephalography ; Humans ; Neuropsychological Tests ; Pilot Projects* ; Prefrontal Cortex* ; Rehabilitation* ; Seoul ; Stroke*

Alterations in the expression of genes that control the cell cycle may be of critical importance in tumorigenesis and malignant transformation. The major regulatory events leading to cell proliferation occur in Gl phase of cell cycle, and the deregulated expression of Gl cyclins is related to oncogenesis. Cyclins Dl and E play important roles in the progression of cell through Gl phase of the cell cycle. Amplification and/or overexpression of the cyclin Dl gene and aberrant expression of cyclin E has been described in various forms of human cancer. However, the role of cyclins Dl and E in cervical cancer has been poorly defined. In this study, we examined the expression of cyclins Dl and E by Northern blot technique and the status of human papil- lomavirus(HPV) type 16 and 18 by polymerase chain reaction in 25 cases of cervical carcinoma to explore the relationship between cyclins Dl and E and cervical cancer. We found cyclin Dl expression showed down-regulated expression in cervical cancer but cyclin E expression was increased in cancer group. Other clinicopathological prognostic factors were not correlated with cyclins D1 and E expression. Further study based on larger numbers of cases with correlation of cyclins D1 and E status and survival data will be needed to elucidate the use of cyclin expressions as prognostic factor.
Blotting, Northern ; Carcinogenesis ; Cell Cycle ; Cell Proliferation ; Cyclin E ; Cyclins* ; Humans ; Polymerase Chain Reaction ; Uterine Cervical Neoplasms

PURPOSE: The purpose of this study was to examine the awareness of fathers about early childhood parenting. METHODS: Selected fathers of children in early childhood were interviewed, and an open-ended questionnaire was utilized to identify the fathers' awareness of the meaning of parenting, priority for parenting, opinions on paternal roles as a child raiser, parenting difficulties, and what education they wanted to receive as fathers. After their statements were collected, a content analysis was done. RESULTS: Results of the content analysis showed there were 45 significant statements, which were classified into 17 categories. The fathers saw the meaning of parenting as being in five different domains: social, cognitive, emotional, physical and environmental. As for paternal roles, they thought that a fathers should serve as emotional supporters. The parenting difficulties that they faced were attributed to time constraints. CONCLUSION: For fathers, development of parent education programs that deal with early childhood parenting knowledge, communication methods and how to play with children according to their developmental stages are required, and qualitative research should be implemented to keep track of the process of changes in parenting characteristics.
Child* ; Education ; Fathers* ; Humans ; Parenting* ; Parents* ; Qualitative Research ; Surveys and Questionnaires

PURPOSE: The purpose of this study was to examine the awareness of fathers about early childhood parenting. METHODS: Selected fathers of children in early childhood were interviewed, and an open-ended questionnaire was utilized to identify the fathers' awareness of the meaning of parenting, priority for parenting, opinions on paternal roles as a child raiser, parenting difficulties, and what education they wanted to receive as fathers. After their statements were collected, a content analysis was done. RESULTS: Results of the content analysis showed there were 45 significant statements, which were classified into 17 categories. The fathers saw the meaning of parenting as being in five different domains: social, cognitive, emotional, physical and environmental. As for paternal roles, they thought that a fathers should serve as emotional supporters. The parenting difficulties that they faced were attributed to time constraints. CONCLUSION: For fathers, development of parent education programs that deal with early childhood parenting knowledge, communication methods and how to play with children according to their developmental stages are required, and qualitative research should be implemented to keep track of the process of changes in parenting characteristics.
Child* ; Education ; Fathers* ; Humans ; Parenting* ; Parents* ; Qualitative Research ; Surveys and Questionnaires

PURPOSE: The aim of this research was to identify the relationships between occupational stress, ethical dilemma, burnout and turnover intention and the factors influencing turnover intention in hospital nurses. METHODS: The participants, 215 nurses, were recruited from two university hospitals located in two provinces of Korea. Data were collected through self-report questionnaires. Collected data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients, and multiple regression with SPSS/WIN 22.0. RESULTS: Participants' scores for occupational stress, ethical dilemma, burnout and turnover intention were 3.96±0.45, 2.60±0.39, 3.71±0.70, and 3.50±0.90 respectively. The results show that the higher the score for occupational stress, ethical dilemma, and burnout the higher the score for turnover intention. The most important factor influencing turnover intention was burnout (β=.42, p < .001), followed by position (β=.21, p=.001), educational level (β=.21, p=.007), ethical dilemma (β=.13, p=.020) in that order. These factors explained 43.5% of total variance in turnover intention (F=19.34, p < .001). CONCLUSION: Changes in hospital structural management systems and support strategies should be developed and operated, taking into account burnout, ethical dilemma, and personal characteristics of clinical nurses in order to reduce turnover.
Ethics ; Hospitals, University ; Humans ; Intention ; Korea ; Personnel Turnover

No abstract available.
Adult* ; Electrodes* ; Humans ; Neural Conduction*

: The purpose of this study was to understand the transition experience of nursing students from non-face-to-face classes to face-to-face classes in the COVID-19 situation. Methods : This study was to a qualitative research conducted using focus group interviews. The participants in this study were 11 nursing students at K University in Seoul, and were 4th grade students who experienced non-face-to-face classes, face-to-face classes, and clinical practice from 2020 to 2022, when COVID-19 began. The data collection period is from November 24 to December 7, 2022, and the collected data were analyzed by applying Colaizzi’s method. Results : As a result of the study, 4 categories, 8 theme clusters, and 20 themes were derived. The four categories were ‘starting face-to-face classes in anxiety’, ‘disappointed with half school life’, ‘an arduous effort to restore everyday life’, and ‘pride in being well prepared as a pre-nurse’. Conclusion : This study is meaningful in that it analyzed the difficulties and various experiences of nursing students in the process of transitioning to face-to-face classes, and can be used as basic data to plan learner-centered educational strategies and teaching methods in the post-COVID-19.

Purpose: To evaluate the accuracy of magnetic resonance imaging (MRI)-guided breast biopsy. Methods: We retrospectively reviewed the clinical data of 111 consecutive patients referred for MRI-guided breast biopsy after mammography and breast ultrasound between May 2009 and April 2019. After excluding 37 patients without follow-up images (> 2 years), 74 patients (74 lesions) were finally included. We reviewed the histologic results of MRI-guided biopsy and subsequent surgery, post-biopsy management, and breast cancer development during followup. We investigated the false-negative rate, ductal carcinoma in situ (DCIS) underestimation, atypical ductal hyperplasia (ADH) underestimation rate, and technical failure rate of MRIguided biopsy. Results: Among 74 scheduled MRI-guided biopsies, six were canceled because biopsy was deemed unnecessary, while three failed due to technical difficulties (technical failure rate:3/68, 4.4%). MRI-guided biopsy was performed in 65 patients, of which 18 patients were diagnosed with malignant lesions, 46 with benign lesions, and one with ADH bordering on DCIS. Subsequent surgery (n = 27) showed DCIS underestimation in three cases (3/7, 43%), ADH underestimation in two cases (1/2, 50%), as well as seven concordant benign and 11 concordant malignant lesions. The overall false-negative rate was 4.3% (2/46). Thirty-eight out of 48 benign lesions were followed-up (median period, 5.8 years; interquartile range, 4.1 years) without subsequent surgery. Thirty-seven concordant benign lesions were stable (n = 27) or disappeared (n = 10); however, the size of one discordant benign lesion increased on follow-up MRI and it was diagnosed as DCIS after 1 year. Conclusion MRI-guided biopsy is an accurate method for exclusion of malignancy with a very low false-negative rate.