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1.
Article | WPRIM | ID: wpr-834557

ABSTRACT

Background@#Reports of metastatic sarcoma to the pancreas are limited. We reviewed the clinicopathologic characteristics of such cases. @*Methods@#We reviewed 124 cases of metastatic tumors to the pancreas diagnosed at Asan Medical Center between 2000 and 2017. @*Results@#Metastatic tumors to the pancreas consisted of 111 carcinomas (89.5%), 12 sarcomas (9.6%), and one melanoma (0.8%). Primary sarcoma sites were bone (n = 4); brain, lung, and soft tissue (n = 2 for each); and the uterus and pulmonary vein (n = 1 for each). Pathologically, the 12 sarcomas comprised 2 World Health Organization grade III solitary fibrous tumors/hemangiopericytomas, and one case each of synovial sarcoma, malignant solitary fibrous tumor, undifferentiated pleomorphic sarcoma, osteosarcoma, mesenchymal chondrosarcoma, intimal sarcoma, myxofibrosarcoma, myxoid liposarcoma, rhabdomyosarcoma, subtype uncertain, and high-grade spindle-cell sarcoma of uncertain type. The median interval between primary cancer diagnosis and pancreatic metastasis was 28.5 months. One case manifested as a solitary pancreatic osteosarcoma metastasis 15 months prior to detection of osteosarcoma in the femur and was initially misdiagnosed as sarcomatoid carcinoma of the pancreas. @*Conclusions@#The metastatic sarcoma should remain a differential diagnosis when spindle-cell malignancy is found in the pancreas, even for solitary lesions or in patients without prior history.

2.
Article in English | WPRIM | ID: wpr-899459

ABSTRACT

Purpose@#This study aimed to develop an educational informatics system for nursing faculty to improve their competencies in teaching patient safety and to evaluate the effectiveness of the system. @*Methods@#We developed a system called, ‘Resource to Enhance Safety Competency and Utilize for Education’ (RESCUE) based on the World Health Organization Multi-professional Patient Safety Curriculum Guide, and it was implemented with full-time nursing faculty in 4-year nursing schools. A one-group pretest-posttest design was used for evaluation. A total of 46 nursing faculty members used the system during a 3-month period. The effects of the RESCUE were measured using a survey including patient safety teaching competency, system usability and user satisfaction. Data were analyzed using descriptive statistics and the Wilcoxon signed-rank test. @*Results@#After using the RESCUE, participants showed a significant increase in self-confidence in teaching patient safety during lectures (Z=-3.61, p<.001) and practica (Z=-3.14, p=.002). @*Conclusion@#The developed informatics system was shown to be effective in improving the self-confidence of nursing faculty in teaching patient safety. To effectively integrate patient safety topics into the curriculum, it can be helpful to utilize the educational materials provided in this study with various clinical cases.

3.
Article in English | WPRIM | ID: wpr-891755

ABSTRACT

Purpose@#This study aimed to develop an educational informatics system for nursing faculty to improve their competencies in teaching patient safety and to evaluate the effectiveness of the system. @*Methods@#We developed a system called, ‘Resource to Enhance Safety Competency and Utilize for Education’ (RESCUE) based on the World Health Organization Multi-professional Patient Safety Curriculum Guide, and it was implemented with full-time nursing faculty in 4-year nursing schools. A one-group pretest-posttest design was used for evaluation. A total of 46 nursing faculty members used the system during a 3-month period. The effects of the RESCUE were measured using a survey including patient safety teaching competency, system usability and user satisfaction. Data were analyzed using descriptive statistics and the Wilcoxon signed-rank test. @*Results@#After using the RESCUE, participants showed a significant increase in self-confidence in teaching patient safety during lectures (Z=-3.61, p<.001) and practica (Z=-3.14, p=.002). @*Conclusion@#The developed informatics system was shown to be effective in improving the self-confidence of nursing faculty in teaching patient safety. To effectively integrate patient safety topics into the curriculum, it can be helpful to utilize the educational materials provided in this study with various clinical cases.

4.
Article in English | WPRIM | ID: wpr-766018

ABSTRACT

BACKGROUND: Most triple-negative breast cancers (TNBCs) have a high histologic grade, are associated with high endoplasmic stress, and possess a high frequency of TP53 mutations. TP53 missense mutations lead to the production of mutant p53 protein and usually show high levels of p53 protein expression. Tumor-infiltrating lymphocytes (TILs) accumulate as part of the anti-tumor immune response and have a strong prognostic and predictive significance in TNBC. We aimed to elucidate the association between p53 expression and the amount of TILs in TNBC. METHODS: In 678 TNBC patients, we evaluated TIL levels and expression of endoplasmic stress molecules. Immunohistochemical examination of p53 protein expression was categorized into three groups: no, low, and high expression. RESULTS: No, low, and high p53 expression was identified in 44.1% (n = 299), 20.1% (n = 136), and 35.8% (n = 243) of patients, respectively. Patients with high p53 expression showed high histologic grade (p < .001), high TIL levels (p = .009), and high expression of endoplasmic reticulum stress-associated molecules (p-eIF2a, p = .013; XBP1, p = .007), compared to patients with low p53 expression. There was no significant difference in disease-free (p = .406) or overall survival rates (p = .444) among the three p53 expression groups. CONCLUSIONS: High p53 expression is associated with increased expression of endoplasmic reticulum stress molecules and TIL influx.


Subject(s)
Breast Neoplasms , Endoplasmic Reticulum , Endoplasmic Reticulum Stress , Humans , Lymphocytes, Tumor-Infiltrating , Mutation, Missense , Survival Rate , Triple Negative Breast Neoplasms
5.
Article in English | WPRIM | ID: wpr-786126

ABSTRACT

BACKGROUND: Microsatellite instability (MSI) analysis is becoming increasingly important in many types of tumor including colorectal cancer (CRC). The commonly used MSI tests are either time-consuming or labor-intensive. A fully automated MSI test, the Idylla MSI assay, has recently been introduced. However, its diagnostic performance has not been extensively validated in clinical CRC samples.METHODS: We evaluated 133 samples whose MSI status had been rigorously validated by standard polymerase chain reaction (PCR), clinical next-generation sequencing (NGS) cancer panel test, or both. We evaluated the diagnostic performance of the Idylla MSI assay in terms of sensitivity, specificity, and positive and negative predictive values, as well as various sample requirements, such as minimum tumor purity and the quality of paraffin blocks.RESULTS: Compared with the gold standard results confirmed through both PCR MSI test and NGS, the Idylla MSI assay showed 99.05% accuracy (104/105), 100% sensitivity (11/11), 98.94% specificity (93/94), 91.67% positive predictive value (11/12), and 100% negative predictive value (93/93). In addition, the Idylla MSI assay did not require macro-dissection in most samples and reliably detected MSI-high in samples with approximately 10% tumor purity. The total turnaround time was about 150 minutes and the hands-on time was less than 2 minutes.CONCLUSIONS: The Idylla MSI assay shows good diagnostic performance that is sufficient for its implementation in the clinic to determine the MSI status of at least the CRC samples. In addition, the fully automated procedure requires only a few slices of formalin-fixed paraffin-embedded tissue and might greatly save time and labor.


Subject(s)
Colorectal Neoplasms , Microsatellite Instability , Microsatellite Repeats , Paraffin , Polymerase Chain Reaction , Sensitivity and Specificity
6.
Article in English | WPRIM | ID: wpr-719716

ABSTRACT

PURPOSE: In the presence of interferon, proteasome subunits are replaced by their inducible counterparts to form an immunoproteasome (IP) plays a key role in generation of antigenic peptides presented by MHC class I molecules, leading to elicitation of a T cell‒mediated immune response. Although the roles of IP in other cancers, and inflammatory diseases have been extensively studied, its significance in breast cancer is unclear. MATERIALS AND METHODS: We investigated the expression of LMP7, an IP subunit, and its relationship with immune system components in two breast cancer cohorts. RESULTS: In 668 consecutive breast cancer cohort, 40% of tumors showed high level of LMP7 expression, and tumors with high expression of LMP7 had more tumor-infiltrating lymphocytes (TILs) in each subtype of breast cancer. In another cohort of 681 triple-negative breast cancer patients cohort, the expression of LMP7 in tumor cells was significantly correlated with the amount of TILs and the expression of interferon-associated molecules (MxA [p < 0.001] and PKR [p < 0.001]), endoplasmic reticulum stress-associated molecules (PERK [p=0.012], p-eIF2a [p=0.001], and XBP1 [p < 0.001]), and damage-associated molecular patterns (HMGN1 [p < 0.001] and HMGB1 [p < 0.001]). Patients with higher LMP7 expression had better disease-free survival outcomes than those with no or low expression in the positive lymph node metastasis group (p=0.041). CONCLUSION: Close association between the TIL levels and LMP7 expression in breast cancer indicates that better antigen presentation through greater LMP7 expression might be associated with more TILs.


Subject(s)
Antigen Presentation , Breast Neoplasms , Breast , Cohort Studies , Disease-Free Survival , Endoplasmic Reticulum , HLA Antigens , HMGB1 Protein , Humans , Immune System , Interferons , Lymph Nodes , Lymphocytes, Tumor-Infiltrating , Neoplasm Metastasis , Peptides , Proteasome Endopeptidase Complex , Triple Negative Breast Neoplasms
7.
Article in English | WPRIM | ID: wpr-150119

ABSTRACT

BACKGROUND: Mutations in centrosomal protein genes have been identified in a number of genetic diseases in brain development, including microcephaly. Centrosomal P4.1-associated protein (CPAP) is one of the causal genes implicated in primary microcephaly. We previously proposed that CPAP is essential for mother centriole maturation during mitosis. METHODS: We immunostained CPAP-depleted cells using the ninein antibody, which selectively detects subdistal appendages in mature mother centrioles. RESULTS: Ninein signals were significantly impaired in CPAP-depleted cells. CONCLUSION: The results suggest that CPAP is required for mother centriole maturation in mammalian cells. The selective absence of centriolar appendages in young mother centrioles may be responsible for asymmetric spindle pole formation in CPAP-depleted cells.


Subject(s)
Brain , Cell Cycle , Centrioles , Centrosome , Humans , Microcephaly , Mitosis , Mothers , Spindle Poles
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