61 research outputs found
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Teaching Religion as a Part of the Social Studies: Superstructures, School Structures and Teacher Subjectivities
As of 2019, the study of religions still remains a relatively unexplored branch of secondary social studies education, particularly in terms of actual classroom praxis. Like the study of race, ethnicity, or gender, religion is often considered a ‘controversial issue’ (Hess & McAvoy, 2015), and looking at religion presents a number of particular challenges for practicing teachers — even for those more advanced in their careers. In this study, I explore two questions related to the teaching of religions as a part of the secondary social studies classroom: 1) What broader forces, both in society at large and in the school setting in particular, influence teachers’ pedagogical and curricular choices around this topic? 2) How do the subjectivities and lived experiences of a teacher contribute to the way he or she teaches about religion as a part of the social studies? These two questions are interrelated. In essence, they can be summed up as follows—which curricular choices around the teaching of religion are a consequence of social forces and what curricular choices are a product of individual subjectivities? How do teachers think about the ways that their school settings and the broader cultural zeitgeist of contemporary America influence the content and methods used to teach about religions? How do they think about their own identities in relation to teaching about religion in the classroom? This qualitative study, using both interviews and classroom observations, examines secondary social studies teachers at three sites in the suburbs of a major metropolitan area in the United States
p53 Protein and Proliferating Cell Nuclear Antigen (PCNA) Expression in Small Round Cell Tumors of Bone and Adjacent Soft Tissue
Sixty small cell tumors of bone and adjacent soft tissue were studied in an attempt to define the incidence of immunohistochemically detectable p53 protein and cor relate these findings with the results of proliferating cell nuclear antigen (PCNA) immunohistochemical staining and mitotic counts. All of the lesions had been for malin-fixed and paraffin-embedded; half were subjected to decalcification prior to processing. The study population included 12 Ewing's sarcomas of bone, 3 atypical Ewing's sarcomas of bone, 3 primitive neuroectodermal tumors of bone, 11 Askin tumors of the thoracopulmonary region, 11 small cell osteosarcomas of bone, 10 mesenchymal chondrosarcomas of bone, and 10 malignant lymphomas involving bone. The patients ranged in age at the time of presentation from 17 to 67 years. Overall, the incidence of p53 positivity was extremely low in these lesions, irre spective of tumor type. Positive nuclear staining with an antibody to p53 was found in none of the 12 Ewing's sarcomas, none of the 3 atypical Ewing's sarcomas, none of the 3 primitive neuroectodermal tumors of bone, 1 of the 11 Askin tumors of the thoracopulmonary region (1.5% of tumor cells positive), 1 of the 11 small cell osteosarcomas (2% of tumor cells positive), 1 of the 10 mesenchymal chondrosar comas of bone (7% of tumor cells positive), and 2 of the 10 malignant lymphomas involving bone (0.5% and 1% of tumor cells positive, respectively). The majority of tumors showed PCNA positivity within the tumor cells, although the incidence of PCNA positivity within the histologic types varied greatly; in general, the higher PCNA counts corresponded to higher mitotic counts within the individual lesions. The present study did not demonstrate any correlation between mutant p53 accu mulation detected by immunohistochemistry and tumor type, and so it is unlikely that p53 positivity will prove to be of great use in the differential diagnosis of these lesions. A correlation between p53 positivity and PCNA staining or mitotic activity was not apparent. Int J Surg Pathol 2(4):259-268, 1995Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66891/2/10.1177_106689699500200401.pd
Two Separated Ileal Adenocarcinomas in Neurofibromatosis Type 1
Patients with neurofibromatosis-1 (NF-1) have increased susceptibility to a variety of malignancies. Here, we document a rare case of two separated ileal adenocarcinomas in NF-1. The adenocarcinomas were surrounded by a diffuse tubular adenomatous lesion of the mucosa, and ganglion cells were scattered in the NF background. We found this case meaningful for several reasons: two separated adenocarcinomas arising in an unusual ileal segment, the association with precancerous tubular adenoma, and the presence of ganglion cells, which suggests ganglioneuromatosis in NF-1
Cell clusters overlying focally disrupted mammary myoepithelial cell layers and adjacent cells within the same duct display different immunohistochemical and genetic features: implications for tumor progression and invasion
INTRODUCTION: Our previous studies detected focal disruptions in myoepithelial cell layers of several ducts with carcinoma in situ. The cell cluster overlying each of the myoepithelial disruptions showed a marked reduction in or a total loss of immunoreactivity for the estrogen receptor (ER). This is in contrast to the adjacent cells within the same duct, which were strongly immunoreactive for the ER. The current study attempts to confirm and expand previous observations on a larger scale. METHODS: Paraffin sections from 220 patients with ER-positive intraductal breast tumors were double immunostained with the same protocol previously used. Cross-sections of ducts lined by ≥ 40 epithelial cells were examined for myoepithelial cell layer disruptions and for ER expression. In five selected cases, ER-negative cells overlying the disrupted myoepithelial cell layer and adjacent ER-positive cells within the same duct were separately microdissected and assessed for loss of heterozygosity and microsatellite instability. RESULTS: Of the 220 cases with 5698 duct cross-sections examined, 94 showed disrupted myoepithelial cell layers with 405 focal disruptions. Of the 94 cases, 79 (84%) contained only ER-negative cell clusters, nine (9.6%) contained both ER-negative and ER-positive cell clusters, and six (6.4%) contained only ER-positive cell clusters overlying disrupted myoepithelial cell layers. Of the 405 disruptions, 350 (86.4%) were overlain by ER-negative cell clusters and 55 (13.6%) were overlain by ER-positive cell clusters (P < 0.01). Microdissected ER-negative and ER-positive cells within the same duct from all five selected cases displayed a different frequency or pattern of loss of heterozygosity and/or microsatellite instability at 10 of the 15 DNA markers. CONCLUSIONS: Cells overlying focally disrupted myoepithelial layers and their adjacent counterparts within the same duct displayed different immunohistochemical and molecular features. These features potentially represent an early sign of the formation of a biologically more aggressive cell clone and the myoepithelial cell layer breakdown possibly associated with tumor progression or invasion
TARJETA POSTAL NAVIDEÑA [Material gráfico]
ITALIACopia digital. Madrid : Ministerio de Educación, Cultura y Deporte, 201
Considering the Neo-Confucians in the Contemporary Debate Between Moral and Intellectual Learning
Highlights The perennial debate regarding the relative usefulness of various forms of knowledge, especially between the theoretical and practical and the intellectual and moral, lies at the heart of education in both past and present times in both the West and China (de Bary, 1988, 2004, 2005, 2015). Neo-Confucians remain relevant in the 21st century and can help us to understand and elucidate contemporary debates in education—specifically, to answer the question Spencer asked nearly a century and a half ago: “What knowledge is of most worth?”. Mencius, Zhu Xi, Wang Yangming, Xu Ai, and Kang Youwei advocated for a type of learning that would strongly resonate with John Dewey (1938) and Paulo Freire (1970, 1978). Foundational philosophies of education, particularly in the United States, have drawn heavily on 20th century European-American thinkers; this article attempts to correct this myopia and broaden perspectives
Simultaneous juvenile polyposis syndrome and neurofibromatosis type 1 - Response to Letter to the Editor
A case of colonic solitary polypoid ganglioneuroma with a feature of inverted hyperplastic polyp
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