231 results on '"Weiss SW"'
Search Results
2. Overexpression of VEGF 121 in inmortalized endothelial cells causes conversion to slowly growing angiosarcoma and high level expression of the VEGF receptors VEGFR-1 and VEGFR-2 in vivo.
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Arbiser, JL, Larsson, H, Claesson-Welsh, Lena, Bai, X, LaMontagne, K, Weiss, SW, Soker, S, Flynn, E, Brown, LF, Arbiser, JL, Larsson, H, Claesson-Welsh, Lena, Bai, X, LaMontagne, K, Weiss, SW, Soker, S, Flynn, E, and Brown, LF
- Published
- 2000
3. Intramuscular Myxoma
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Buetow Pc, J S Jelinek, B H Berrey, Mark J. Kransdorf, Weiss Sw, and Richard P. Moser
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Adult ,Male ,Thigh ,Lesion ,Muscular Diseases ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,medicine.diagnostic_test ,business.industry ,Muscles ,Myxoma ,Skeletal muscle ,Magnetic resonance imaging ,Anatomy ,Intramuscular Myxoma ,medicine.disease ,Magnetic Resonance Imaging ,medicine.anatomical_structure ,Homogeneous ,Spin echo ,Female ,medicine.symptom ,Tomography, X-Ray Computed ,business - Abstract
Intramuscular myxoma is a benign mesenchymal lesion consisting of bland spindled cells embedded in an avascular myxoid stroma. On CT, intramuscular myxoma presents as a well-demarcated, homogeneous, low density mass situated within skeletal muscle. The attenuation of the lesion is slightly greater than water but less than that of the surrounding normal muscle, with typical values between +10 and +60 HU. There is scant magnetic resonance (MR) literature on the appearance of intramuscular myxoma; the few MR spin echo images that have been published characterize it as a homogeneous mass with signal intensity less than or equal to skeletal muscle on T1-weighted and brighter than fat on T2-weighted pulse sequences. We present two cases of intramuscular myxoma with imaging characteristics that differ from those previously reported.
- Published
- 1989
4. Protocol for the examination of specimens from patients with tumors of soft tissue.
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Rubin BP, Cooper K, Fletcher CDM, Folpe AL, Gannon FH, Hunt JL, Lazar AJ, Montag AG, Peabody TD, Pollock RE, Reith JD, Qualman SJ, Rosenberg AE, Weiss SW, Krausz T, and College of American Pathologists. Members of the Cancer Committee
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- 2010
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5. Ethics Inside the Black Box: Integrating Science and Technology Studies into Engineering and Public Policy Curricula.
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Lawrence C, Jasanoff S, Evans SW, Raffel K, and Mahadevan L
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- Humans, Technology, Education, Graduate, Public Policy, Curriculum, Engineering
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There is growing need for hybrid curricula that integrate constructivist methods from Science and Technology Studies (STS) into both engineering and policy courses at the undergraduate and graduate levels. However, institutional and disciplinary barriers have made implementing such curricula difficult at many institutions. While several programs have recently been launched that mix technical training with consideration of "societal" or "ethical issues," these programs often lack a constructivist element, leaving newly-minted practitioners entering practical fields ill-equipped to unpack the politics of knowledge and technology or engage with skeptical publics. This paper presents a novel format for designing interdisciplinary coursework that combines conceptual content from STS with training in engineering and policy. Courses following this format would ideally be team taught by instructors with advanced training in diverse fields, and hence co-learning between instructors and disciplines is a key element of the format. Several instruments for facilitating both student and instructor collaborative learning are introduced. The format is also designed for versatility: in addition to being adaptable to both technical and policy training environments, topics are modularized around a conceptual core so that issues ranging from biotech to nuclear security can be incorporated to fit programmatic needs and resources., (© 2023. The Author(s), under exclusive licence to Springer Nature B.V.)
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- 2023
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6. Exploring the value of a global gene drive project registry.
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Taitingfong RI, Triplett C, Vásquez VN, Rajagopalan RM, Raban R, Roberts A, Terradas G, Baumgartner B, Emerson C, Gould F, Okumu F, Schairer CE, Bossin HC, Buchman L, Campbell KJ, Clark A, Delborne J, Esvelt K, Fisher J, Friedman RM, Gronvall G, Gurfield N, Heitman E, Kofler N, Kuiken T, Kuzma J, Manrique-Saide P, Marshall JM, Montague M, Morrison AC, Opesen CC, Phelan R, Piaggio A, Quemada H, Rudenko L, Sawadogo N, Smith R, Tuten H, Ullah A, Vorsino A, Windbichler N, Akbari OS, Long K, Lavery JV, Evans SW, Tountas K, and Bloss CS
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- Registries, Data Collection, Gene Drive Technology
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- 2023
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7. Hurdles in responsive community engagement for the development of environmental biotechnologies.
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Normandin AM, Fitzgerald LM, Yip J, and Evans SW
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Recent calls for engaging communities in biotechnology development do not draw enough attention to the hurdles that must be overcome for engagement strategies to effectively feed back into research design and conduct. These hurdles call into question many standard ways of operating and assessing in traditional scientific disciplines. The first steps in addressing these hurdles can be the most difficult. In reflecting on our own experiences in the early-stage development of environmental biotechnologies, we provide a set of techniques to help scientists and their collaborators learn to become more responsive to the needs and attitudes of communities with which they are engaging. Graphical Abstract ., (© The Author(s) 2022. Published by Oxford University Press.)
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- 2022
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8. Recommendations for environmental risk assessment of gene drive applications for malaria vector control.
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Connolly JB, Mumford JD, Glandorf DCM, Hartley S, Lewis OT, Evans SW, Turner G, Beech C, Sykes N, Coulibaly MB, Romeis J, Teem JL, Tonui W, Lovett B, Mankad A, Mnzava A, Fuchs S, Hackett TD, Landis WG, Marshall JM, and Aboagye-Antwi F
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- Animals, Mosquito Control, Mosquito Vectors genetics, Risk Assessment, Anopheles genetics, Gene Drive Technology, Malaria prevention & control
- Abstract
Building on an exercise that identified potential harms from simulated investigational releases of a population suppression gene drive for malaria vector control, a series of online workshops identified nine recommendations to advance future environmental risk assessment of gene drive applications., (© 2022. The Author(s).)
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- 2022
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9. Making Security Viral: Shifting Engineering Biology Culture and Publishing.
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Mackelprang R, Adamala KP, Aurand ER, Diggans JC, Ellington AD, Evans SW, Fortman JLC, Hillson NJ, Hinman AW, Isaacs FJ, Medford JI, Mamaghani S, Moon TS, Palmer MJ, Peccoud J, Vitalis EA, Hook-Barnard I, and Friedman DC
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- Genes, Viral, SARS-CoV-2 genetics, Synthetic Biology, Bioengineering, Publishing, Security Measures organization & administration
- Abstract
The ability to construct, synthesize, and edit genes and genomes at scale and with speed enables, in synergy with other tools of engineering biology, breakthrough applications with far-reaching implications for society. As SARS-CoV-2 spread around the world in early spring of 2020, researchers rapidly mobilized, using these tools in the development of diagnostics, therapeutics, and vaccines for COVID-19. The sharing of knowledge was crucial to making rapid progress. Several publications described the use of reverse genetics for the de novo construction of SARS-CoV-2 in the laboratory, one in the form of a protocol. Given the demonstrable harm caused by the virus, the unequal distribution of mitigating vaccines and therapeutics, their unknown efficacy against variants, and the interest in this research by laboratories unaccustomed to working with highly transmissible pandemic pathogens, there are risks associated with such publications, particularly as protocols. We describe considerations and offer suggestions for enhancing security in the publication of synthetic biology research and techniques. We recommend: (1) that protocol manuscripts for the de novo synthesis of certain pathogenic viruses undergo a mandatory safety and security review; (2) that if published, such papers include descriptions of the discussions or review processes that occurred regarding security considerations in the main text; and (3) the development of a governance framework for the inclusion of basic security screening during the publication process of engineering biology/synthetic biology manuscripts to build and support a safe and secure research enterprise that is able to maximize its positive impacts and minimize any negative outcomes.
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- 2022
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10. iGEM and Gene Drives: A Case Study for Governance.
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Millett P, Alexanian T, Palmer MJ, Evans SW, Kuiken T, and Oye K
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- Genetic Engineering, Humans, Risk Assessment, Risk Management, Uncertainty, United States, Gene Drive Technology
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Gene drives have already challenged governance systems. In this case study, we explore the International Genetically Engineered Machine (iGEM) competition's experiences in gene drive-related research and lessons in developing, revising, and implementing a governance system. iGEM's experiences and lessons are distilled into 6 key insights for future gene drive policy development in the United States: (1) gene drives deserve special attention because of their potential for widescale impact and remaining uncertainty about how to evaluate intergenerational and transboundary risks; (2) an adaptive risk management approach is logical for gene drives because of the rapidly changing technical environment; (3) review by individual technical experts is limited and may fail to incorporate other forms of expertise and, therefore, must be complemented with a range of alternative governance methods; (4) current laboratory biosafety and biosecurity review processes may not capture gene drive research or its components in practice even if they are covered theoretically; (5) risk management for research and development must incorporate discussions of values and broader implications of the work; and (6) a regular technology horizon scanning capacity is needed for the early identification of advances that could pose governance system challenges.
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- 2022
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11. Science, technology, security: Towards critical collaboration.
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Evans SW, Leese M, and Rychnovská D
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- Security Measures, Science, Technology
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Science and technology play a central role in the contemporary governance of security, both as tools for the production of security and as objects of security concern. Scholars are increasingly seeking to not only critically reflect on the interplays between science, technology and security, but also engage with the practices of security communities that shape and are shaped by science and technology. To further help this growth of interest in security topics within science and technology studies (STS), we explore possible modes of socio-technical collaboration with security communities of practice. Bringing together literatures from STS and critical security studies, we identify several key challenges to critical social engagement of STS scholars in security-related issues. We then demonstrate how these challenges played out over the course of three case studies from our own experience in engaging security communities of practice. We use these vignettes to show that there is a rich vein of developments in both theory and practice that STS scholars can pursue by attending to the interplay of science, technology and security.
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- 2021
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12. Core commitments for field trials of gene drive organisms.
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Long KC, Alphey L, Annas GJ, Bloss CS, Campbell KJ, Champer J, Chen CH, Choudhary A, Church GM, Collins JP, Cooper KL, Delborne JA, Edwards OR, Emerson CI, Esvelt K, Evans SW, Friedman RM, Gantz VM, Gould F, Hartley S, Heitman E, Hemingway J, Kanuka H, Kuzma J, Lavery JV, Lee Y, Lorenzen M, Lunshof JE, Marshall JM, Messer PW, Montell C, Oye KA, Palmer MJ, Papathanos PA, Paradkar PN, Piaggio AJ, Rasgon JL, Rašić G, Rudenko L, Saah JR, Scott MJ, Sutton JT, Vorsino AE, and Akbari OS
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- Animals, Guidelines as Topic, Gene Drive Technology standards, Organisms, Genetically Modified, Safety
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- 2020
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13. Embrace experimentation in biosecurity governance.
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Evans SW, Beal J, Berger K, Bleijs DA, Cagnetti A, Ceroni F, Epstein GL, Garcia-Reyero N, Gillum DR, Harkess G, Hillson NJ, Hogervorst PAM, Jordan JL, Lacroix G, Moritz R, ÓhÉigeartaigh SS, Palmer MJ, and van Passel MWJ
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- Animals, Humans, Biomedical Research, Containment of Biohazards methods
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- 2020
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14. Lymphatic-type "Angiosarcoma" With Prominent Lymphocytic Infiltrate.
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Martinez AP, Zapata M, North PE, Folpe AL, and Weiss SW
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- Adult, Aged, Aged, 80 and over, Biomarkers, Tumor metabolism, Female, Follow-Up Studies, Hemangioendothelioma diagnosis, Hemangioendothelioma mortality, Hemangiosarcoma diagnosis, Hemangiosarcoma mortality, Humans, Lymphangiosarcoma diagnosis, Lymphangiosarcoma mortality, Lymphatic Vessels pathology, Lymphocytes metabolism, Male, Middle Aged, Prognosis, Skin Neoplasms diagnosis, Skin Neoplasms mortality, Soft Tissue Neoplasms diagnosis, Soft Tissue Neoplasms mortality, Survival Analysis, Hemangioendothelioma pathology, Hemangiosarcoma pathology, Lymphangiosarcoma pathology, Skin Neoplasms pathology, Soft Tissue Neoplasms pathology
- Abstract
We report 21 cases of a distinctive and unique vascular tumor which we propose to be a pure lymphatic-type angiosarcoma characterized by architectural and growth characteristics of angiosarcoma, cytologic, and immunohistochemical features of lymphatic differentiation, a prominent lymphocytic infiltrate, and variable nuclear grade. Patients included 12 males and 9 females with a median age of 65 years (range: 32 to 95 y). Tumors involved the head and neck (n=11), lower extremities (n=5), trunk (n=4), and upper extremity (n=1) and were located superficially in the dermis and/or subcutis. Tumors were designated "low grade" (n=10) when the nuclear grade was low, and vascular channel formation was evident throughout but with multilayering of endothelium within the vessels. Cases were designated "high grade" (n=11) when nuclei appeared higher grade with more rounded contours and prominent nucleoli and when solid areas predominated over vascular channel formation. A striking feature of both groups was the presence of a dense, lymphocytic infiltrate with occasional germinal center formation. All cases strongly and diffusely expressed at least 1 lymphatic marker (21/21) with podoplanin (17/19) and Prox-1 (11/11) more commonly expressed than LYVE-1 (5/10). No consistent molecular alteration was identified. Follow-up on 17 patients (median: 41 mo, mean: 54 mo) showed 10 patients were alive without disease, 5 were alive with disease, 1 died of other cause, and 1 died of disease. Local recurrence developed in 9 cases and metastasis in 2 cases, although neither correlated with grade as defined. On the basis of clinical follow-up to date, the natural history of lymphatic-type angiosarcoma appears to be more favorable than other forms of cutaneous angiosarcoma.
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- 2020
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15. Adverse Events in Genetic Testing: The Fourth Case Series.
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Farmer MB, Bonadies DC, Mahon SM, Baker MJ, Ghate SM, Munro C, Nagaraj CB, Besser AG, Bui K, Csuy CM, Kirkpatrick B, McCarty AJ, McQuaid SW, Sebastian J, Sternen DL, Walsh LK, and Matloff ET
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- Diagnostic Errors, Genetic Counseling methods, Genetic Counseling standards, Genetic Testing methods, Humans, Medical Errors, Medical Overuse, United States, Genetic Testing standards
- Abstract
Purpose: In this ongoing national case series, we document 25 new genetic testing cases in which tests were recommended, ordered, interpreted, or used incorrectly., Methods: An invitation to submit cases of adverse events in genetic testing was issued to the general National Society of Genetic Counselors Listserv, the National Society of Genetic Counselors Cancer Special Interest Group members, private genetic counselor laboratory groups, and via social media platforms (i.e., Facebook, Twitter, LinkedIn). Examples highlighted in the invitation included errors in ordering, counseling, and/or interpretation of genetic testing and did not limit submissions to cases involving genetic testing for hereditary cancer predisposition. Clinical documentation, including pedigree, was requested. Twenty-six cases were accepted, and a thematic analysis was performed. Submitters were asked to approve the representation of their cases before manuscript submission., Results: All submitted cases took place in the United States and were from cancer, pediatric, preconception, and general adult settings and involved both medical-grade and direct-to-consumer genetic testing with raw data analysis. In 8 cases, providers ordered the wrong genetic test. In 2 cases, multiple errors were made when genetic testing was ordered. In 3 cases, patients received incorrect information from providers because genetic test results were misinterpreted or because of limitations in the provider's knowledge of genetics. In 3 cases, pathogenic genetic variants identified were incorrectly assumed to completely explain the suspicious family histories of cancer. In 2 cases, patients received inadequate or no information with respect to genetic test results. In 2 cases, result interpretation/documentation by the testing laboratories was erroneous. In 2 cases, genetic counselors reinterpreted the results of people who had undergone direct-to-consumer genetic testing and/or clarifying medical-grade testing was ordered., Discussion: As genetic testing continues to become more common and complex, it is clear that we must ensure that appropriate testing is ordered and that results are interpreted and used correctly. Access to certified genetic counselors continues to be an issue for some because of workforce limitations. Potential solutions involve action on multiple fronts: new genetic counseling delivery models, expanding the genetic counseling workforce, improving genetics and genomics education of nongenetics health care professionals, addressing health care policy barriers, and more. Genetic counselors have also positioned themselves in new roles to help patients and consumers as well as health care providers, systems, and payers adapt to new genetic testing technologies and models. The work to be done is significant, but so are the consequences of errors in genetic testing.
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- 2019
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16. Developing a Comprehensive, Adaptive, and International Biosafety and Biosecurity Program for Advanced Biotechnology: The iGEM Experience.
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Millett P, Binz T, Evans SW, Kuiken T, Oye K, Palmer MJ, van der Vlugt C, Yambao K, and Yu S
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Introduction: The international synthetic biology competition iGEM (formally known as the international Genetically Engineered Machines competition) has a dedicated biosafety and biosecurity program., Method: A review of specific elements of the program and a series of concrete examples illustrate how experiences in implementing the program have helped improved policy, including an increasing diversity of sources for genetic parts and organisms, keeping pace with technical developments, considering pathways toward future environmental release, addressing antimicrobial resistance, and testing the efficacy of current biosecurity arrangements., Results: iGEM's program is forward-leaning, in that it addresses both traditional (pathogen-based) and emerging risks both in terms of new technologies and new risks. It is integrated into the technical work of the competition-with clearly described roles and responsibilities for all members of the community. It operates throughout the life cycle of projects-from project design to future application. It makes use of specific tools to gather and review biosafety and biosecurity information, making it easier for those planning and conducting science and engineering to recognize potential risks and match them with appropriate risk management approaches, as well as for specialists to review this information to identify gaps and strengthen plans., Discussion: Integrating an increasingly adaptive risk management approach has allowed iGEM's biosafety and biosecurity program to become comprehensive, be cross-cutting, and cover the competition's life cycle., Competing Interests: The authors declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: All authors are also members of iGEM’s Safety and Security Committee., (© ABSA International 2019.)
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- 2019
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17. Mice Against Ticks: an experimental community-guided effort to prevent tick-borne disease by altering the shared environment.
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Buchthal J, Evans SW, Lunshof J, Telford SR 3rd, and Esvelt KM
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- Animals, Disease Reservoirs veterinary, Immunization methods, Ixodes microbiology, Lyme Disease prevention & control, Rodent Diseases prevention & control, Borrelia burgdorferi physiology, CRISPR-Cas Systems immunology, Clustered Regularly Interspaced Short Palindromic Repeats immunology, Immunization veterinary, Lyme Disease veterinary, Peromyscus immunology
- Abstract
Mice Against Ticks is a community-guided ecological engineering project that aims to prevent tick-borne disease by using CRISPR-based genome editing to heritably immunize the white-footed mice ( Peromyscus leucopus) responsible for infecting many ticks in eastern North America. Introducing antibody-encoding resistance alleles into the local mouse population is anticipated to disrupt the disease transmission cycle for decades. Technology development is shaped by engagement with community members and visitors to the islands of Nantucket and Martha's Vineyard, including decisions at project inception about which types of disease resistance to pursue. This engagement process has prompted the researchers to use only white-footed mouse DNA if possible, meaning the current project will not involve gene drive. Instead, engineered mice would be released in the spring when the natural population is low, a plan unlikely to increase total numbers above the normal maximum in autumn. Community members are continually asked to share their suggestions and concerns, a process that has already identified potential ecological consequences unanticipated by the research team that will likely affect implementation. As an early example of CRISPR-based ecological engineering, Mice Against Ticks aims to start small and simple by working with island communities whose mouse populations can be lastingly immunized without gene drive. This article is part of a discussion meeting issue 'The ecology and evolution of prokaryotic CRISPR-Cas adaptive immune systems'.
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- 2019
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18. Intrasinusoidal Spread of Hepatic Epithelioid Hemangioendothelioma: Implications for the Diagnosis in Minimal Samples.
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Agostini-Vulaj D, Pehlivanoglu B, Weiss SW, Krasinskas A, Feely MM, Hornick JL, Cates JMM, Bentley KLM, Adsay NV, and Gonzalez RS
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- Adolescent, Adult, Aged, Capillaries pathology, Female, Humans, Male, Middle Aged, Young Adult, Hemangioendothelioma, Epithelioid diagnosis, Hemangioendothelioma, Epithelioid pathology, Liver Neoplasms diagnosis, Liver Neoplasms pathology
- Abstract
Epithelioid hemangioendothelioma (EHE) is an angiocentric tumor that, when arising in liver, is centered around hepatic/portal veins. However, EHE cells can also track along sinusoids, which is not well recognized or studied. We identified 18 cases of hepatic EHE and 6 nonhepatic EHEs. For all cases, we recorded EHE multifocality and maximum size. When tumor cells were identified apart from the main mass, we recorded their location, maximum distance from the main tumor, density per high-power field, and cytomorphology. Immunohistochemical staining for CAMTA1, ERG, and CAM5.2 was performed on all cases. Lesional cells were present apart from the main mass in 17 of 18 (94%) liver cases, always within sinusoids and occasionally (4/17, 24%) in central veins. They appeared intensely hyperchromatic with vaguely cerebriform nuclei and multinucleation in 6 (35%) of cases. CAMTA1 and ERG positivity was seen in all 17 cases. Two cases (12%) demonstrated focal CAM5.2 positivity. Sinusoidal EHE cells ranged from 0.1 to 0.8 cm away from the main tumor. There were no statistically significant associations between histologic findings and patient outcome. In the 6 nonhepatic cases, tumor cells did not extend beyond the main EHE. Lesional cells in hepatic EHE often extend beyond the main lesion into sinusoids, where they demonstrate an unusual, somewhat distinctive morphology. Care should be taken to identify such cells in limited biopsies; immunohistochemistry for CAMTA1, a specific and sensitive marker for EHE, can be confirmatory.
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- 2019
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19. Histiocyte-rich rhabdomyoblastic tumor: rhabdomyosarcoma, rhabdomyoma, or rhabdomyoblastic tumor of uncertain malignant potential? A histologically distinctive rhabdomyoblastic tumor in search of a place in the classification of skeletal muscle neoplasms.
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Martinez AP, Fritchie KJ, Weiss SW, Agaimy A, Haller F, Huang HY, Lee S, Bahrami A, and Folpe AL
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- Adult, Aged, Female, Humans, Male, Middle Aged, Rhabdomyoma pathology, Rhabdomyosarcoma pathology, Young Adult, Muscle Neoplasms classification, Muscle Neoplasms pathology, Muscle, Skeletal pathology
- Abstract
Skeletal muscle tumors are traditionally classified as rhabdomyoma or rhabdomyosarcoma. We have identified an unusual adult rhabdomyoblastic tumor not clearly corresponding to a previously described variant of rhabdomyoma or rhabdomyosarcoma, characterized by a very striking proliferation of non-neoplastic histiocytes, obscuring the underlying tumor. Ten cases were identified in nine males and one female with a median age of 43 years (range 23-69 years). Tumors involved the deep soft tissues of the trunk (N = 4), lower limbs (N = 4), and neck (N = 2). Tumors were well-circumscribed, nodular masses, frequently surrounded by a fibrous capsule containing lymphoid aggregates and sometimes calcifications. Numerous foamy macrophages, multinucleated Touton-type giant cells, and sheets/fascicles of smaller, often spindled macrophages largely obscured the underlying desmin, MyoD1, and myogenin-positive rhabdomyoblastic tumor. Cases were wild type for MYOD1 and no other mutations or rearrangements characteristic of a known subtype of rhabdomyoma or rhabdomyosarcoma were identified. Two of four cases successfully analyzed using a next-generation sequencing panel of 170 common cancer-related genes harbored inactivating NF1 mutations. Next-generation sequencing showed no gene fusions. Clinical follow (nine patients; median 9 months; mean 23 months; range 3-124 months) showed all patients received wide excision; four patients also received adjuvant radiotherapy and none received chemotherapy. At the time of last follow-up, all patients were alive and without disease; no local recurrences or distant metastases occurred. We hypothesize that these unusual tumors represent rhabdomyoblastic tumors of uncertain malignant potential. Possibly over time they should be relegated to a new category of skeletal muscle tumors of intermediate (borderline) malignancy.
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- 2019
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20. Clinicohistopathological Characteristics of Malignant Melanoma in the Gall Bladder: A Case Report and Review of the Literature.
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Adrian S, Clemens C, Elisabeth SW, and Sylvia S
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Objective: Primary gall bladder melanoma is a rare and controversial entity. So far, only 36 cases are documented in the literature. Metastatic melanoma targeting the gall bladder, however, has been reported to occur in about 15-20% of melanoma patients and is much more common., Methods: Based on the case of a 58-year-old woman presenting with multiple melanoma nodules in the gall bladder, we searched in the available literature in PubMed for articles describing a "primary melanoma of the gallbladder" regardless of language used., Results: We detected 33 papers that described 36 cases of primary gall bladder melanoma between 1907 and 2017. From different criteria distinguishing primary and secondary gall bladder melanoma, generally, the following were accepted: (1) exclusion of previous primary melanoma, (2) absence of synchronous involvement of other sites, (3) unicity of the lesion, (4) polypoid or papillary shape of the lesion, and (5) presence of junctional melanocitary component. Review of the 36 published cases revealed that only about one-fourth of them fulfilled all the five criteria., Conclusion: Primary gall bladder melanoma is even rarer than described in the literature, and the question whether this entity really exists remains open.
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- 2018
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21. Influence of exercise on oxidative stress in patients with heart failure.
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Sties SW, Andreato LV, de Carvalho T, Gonzáles AI, Angarten VG, Ulbrich AZ, de Mara LS, Netto AS, da Silva EL, and Andrade A
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- Biomarkers metabolism, Humans, Reactive Oxygen Species metabolism, Exercise Therapy methods, Exercise Tolerance physiology, Heart Failure metabolism, Heart Failure physiopathology, Heart Failure rehabilitation, Oxidative Stress physiology, Oxygen Consumption physiology
- Abstract
Reactive oxygen species play an important role in the pathophysiology of heart failure (HF). In contrast, regular physical exercise can promote adaptations to reactive oxygen species that are beneficial for patients with HF. We completed a systematic review of randomized controlled trials that evaluate the influence of exercise on oxidative stress in patients with HF. Articles were searched in the PubMed, Cochrane, SciELO, and LILACS databases. The search was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The quality of the included studies was assessed using the Physiotherapy Evidence Database scale. We selected 12 studies with a total of 353 participants. The included patients had a left ventricle ejection fraction of < 52% and New York Heart Association functional class II or III disease. A significant increase was observed in peak oxygen consumption (between 10 and 46%) in the group that underwent training (TG). There was an improvement in the oxidative capacity of skeletal muscles in the TG, related to the positive activity of mitochondrial cytochrome c oxidase (between 27 and 41%). An increase in the expression of the enzymes glutathione peroxidase (41%), catalase (between 14 and 42%), and superoxide dismutase (74.5%), and a decrease in lipid peroxidation (between 28.8 and 58.5%) were observed in the TG. Physical training positively influenced the cardiorespiratory capacity and enhanced the benefits of oxidant and antioxidant biomarkers in patients with HF. High-intensity training promoted a 15% increase in the plasma total antioxidant capacity, whereas moderate training had no effect.
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- 2018
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22. Homecare and Healthcare Utilization Errors Post-Neonatal Intensive Care Unit Discharge.
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Patel R, Nudelman M, Olarewaju A, Pooley SW, Jegatheesan P, Song D, and Govindaswami B
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- Cohort Studies, Female, Humans, Infant, Newborn, Male, Patient Discharge statistics & numerical data, Prospective Studies, Home Care Services, Hospital-Based statistics & numerical data, Infant, Premature, Intensive Care, Neonatal statistics & numerical data, Medical Errors statistics & numerical data, Postnatal Care statistics & numerical data
- Abstract
Background: High-risk infants transitioning from the neonatal intensive care unit (NICU) to home represent a vulnerable population, given their complex care requirements. Little is known about errors during this period., Purpose: Identify and describe homecare and healthcare utilization errors in high-risk infants following NICU discharge., Methods: This was a prospective observational cohort study of homecare (feeding, medication, and equipment) and healthcare utilization (appointment) errors in infants discharged from a regional NICU between 2011 and 2015. Chi-square test and Wilcoxon rank-sum test were used to compare infant and maternal demographics between infants with and without errors., Results: A total of 363 errors were identified in 241 infants during 635 home visits. The median number of visits was 2. No significance was found between infant and maternal demographics in those with or without errors., Implications of Practice: High-risk infants have complex care needs and can benefit from regular follow-up services. Home visits provide an opportunity to identify, intervene, and resolve homecare and healthcare utilization errors., Implications of Research: Further research is needed to evaluate the prevalence and cause of homecare errors in high-risk infants and how healthcare resources and infant health outcomes are affected by those errors. Preventive measures and mitigating interventions that best address homecare errors require further development and subsequent description.
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- 2017
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23. Fibrous hamartoma of infancy: a clinicopathologic study of 145 cases, including 2 with sarcomatous features.
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Al-Ibraheemi A, Martinez A, Weiss SW, Kozakewich HP, Perez-Atayde AR, Tran H, Parham DM, Sukov WR, Fritchie KJ, and Folpe AL
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- Adolescent, Child, Child, Preschool, Female, Gene Rearrangement, Hamartoma genetics, Humans, Infant, Infant, Newborn, Male, Neoplasm Recurrence, Local genetics, Neoplasm Recurrence, Local pathology, Proto-Oncogene Proteins c-sis genetics, Sarcoma genetics, Soft Tissue Neoplasms genetics, Hamartoma pathology, Sarcoma pathology, Soft Tissue Neoplasms pathology
- Abstract
Fibrous hamartoma of infancy is a rare soft tissue lesion of infants and young children with characteristic triphasic morphology, which typically occurs in the axilla and less commonly in other locations. We reviewed 145 cases of fibrous hamartoma of infancy from our consultation archives. Cases occurred in 106 males and 39 females (mean age-15 months; range-birth to 14 years), and involved both typical sites (eg, axilla/back/upper arm) (n=69) and unusual locations (n=76). Six were congenital. The tumors presented as subcutaneous masses and ranged from 0.4 to 17 cm (mean 3 cm). All displayed triphasic morphology, but varied widely in the relative percentages of fat, fibroblastic fascicles, and primitive mesenchyme. Hyalinized zones with cracking artifact, mimicking giant cell fibroblastoma, were present in a 44 (30%) of cases; however FISH for PDGFB gene rearrangement was negative in five tested cases. In addition to classical fibrous hamartoma of infancy, two lesions contained large sarcomatous-appearing foci with high cellularity, high nuclear grade, and brisk mitotic activity. One occurred in a 10-month-old female as a new mass in a congenital fibrous hamartoma of infancy; the other occurred as a leg mass in a 6-year-old male. ETV6 gene rearrangement was negative in the tumor from the 10-month-old female. Genomic microarray (OncoScan) showed normal molecular karyotype in eight tested cases, whereas the two tumors with sarcomatous features showed a hyperdiploid/near tetraploid molecular karyotype with copy neutral loss of heterozygosity of chromosomes 1p and 11p, and loss of 10p, chromosome 14, and a large portion of chromosome 22q (22q11.23q13.33), respectively. Follow-up (52 patients; range: 1-208 months, median: 8 months) showed only two local recurrences and no metastases. Extensive local disease in the 10-month-old female with sarcomatous-appearing fibrous hamartoma of infancy necessitated forequarter amputation. In summary, our study confirms the classic clinicopathologic features, including the triphasic morphologic appearance of most cases. In contrast to earlier studies, our series illustrates a broader histologic spectrum than previously appreciated, including its close resemblance to giant cell fibroblastoma in one quarter of cases and the rare presence of 'sarcomatous' areas, the latter providing evidence that these are complex neoplasms rather than hamartomas.
- Published
- 2017
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24. MDM2 and CDK4 Immunohistochemistry: Should It Be Used in Problematic Differentiated Lipomatous Tumors?: A New Perspective.
- Author
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Clay MR, Martinez AP, Weiss SW, and Edgar MA
- Subjects
- Diagnosis, Differential, Humans, Immunohistochemistry, In Situ Hybridization, Fluorescence, Lipoma pathology, Liposarcoma pathology, Sensitivity and Specificity, Biomarkers, Tumor metabolism, Cyclin-Dependent Kinase 4 metabolism, Lipoma diagnosis, Lipoma metabolism, Liposarcoma diagnosis, Liposarcoma metabolism, Proto-Oncogene Proteins c-mdm2 metabolism
- Abstract
Although most cases of atypical lipomatous tumor/well-differentiated liposarcoma (ALT/WDL) can be diagnosed solely on the basis of histologic features, those lacking diagnostic histologic features require ancillary studies for accurate classification. Fluorescent in situ hybridization (FISH) for amplification of MDM2 has been considered the gold standard for diagnosis in these situations. Immunostaining for MDM2 and/or CDK4 has been adopted as a surrogate method because of its high concordance rate with FISH and lower cost. However, studies examining the concordance of the 2 methods have been based preferentially on cases in which the diagnosis could be established histologically. No study has explored the concordance between the 2 methods in histologically ambiguous cases or in cases in which the diagnosis of ALT/WDL is not apparent after a review of all slides. To address this, we performed immunostaining for MDM2 and CDK4 on 183 well-differentiated lipomatous tumors that could not be diagnosed on purely histologic grounds and that were, therefore, subjected to FISH analysis. These included ALT/WDLs (n=56), lipomas (n=96), and lipoma variants (n=31). Staining for MDM2 and CDK4 was noted in 25/56 and 23/56 ALT/WDL, respectively, giving a sensitivity of 45% and 41% and a specificity of 98% and 92%. Staining was noted exclusively in the nuclei of atypical cells and not in the nuclei of adipocytes. Staining for MDM2 and CDK4 occurred in 2/125 and 10/117 benign lipomatous lesions, respectively. False-positive staining was equivalent in intensity to ALT/WDL. We conclude that MDM2 and CDK4 staining is a relatively insensitive method for diagnosing ALT/WDL in cases that are histologically ambiguous, as staining is restricted to neoplastic cells with atypia that are underrepresented in these cases. Therefore, in cases like ours that closely simulate clinical practice, FISH is the more reliable and cost-effective option.
- Published
- 2016
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25. TGFBR3 and MGEA5 rearrangements are much more common in "hybrid" hemosiderotic fibrolipomatous tumor-myxoinflammatory fibroblastic sarcomas than in classical myxoinflammatory fibroblastic sarcomas: a morphological and fluorescence in situ hybridization study.
- Author
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Zreik RT, Carter JM, Sukov WR, Ahrens WA, Fritchie KJ, Montgomery EA, Weiss SW, and Folpe AL
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Cell Differentiation, Disease Progression, Female, Fibroma enzymology, Fibroma pathology, Genetic Predisposition to Disease, Hemosiderosis enzymology, Hemosiderosis pathology, Humans, Lipoma enzymology, Lipoma pathology, Male, Middle Aged, Phenotype, Predictive Value of Tests, Sarcoma enzymology, Sarcoma pathology, Soft Tissue Neoplasms enzymology, Soft Tissue Neoplasms pathology, Young Adult, Antigens, Neoplasm genetics, Biomarkers, Tumor genetics, Fibroblasts enzymology, Fibroblasts pathology, Fibroma genetics, Gene Rearrangement, Hemosiderosis genetics, Histone Acetyltransferases genetics, Hyaluronoglucosaminidase genetics, In Situ Hybridization, Fluorescence, Lipoma genetics, Proteoglycans genetics, Receptors, Transforming Growth Factor beta genetics, Sarcoma genetics, Soft Tissue Neoplasms genetics
- Abstract
Myxoinflammatory fibroblastic sarcoma (MIFS) is a rare low-grade sarcoma that most often involves the distal extremities of adults. Some MIFSs have been reported to show TGFBR3 and MGEA5 rearrangements. TGFBR3 and MGEA5 rearrangements have also been reported in hemosiderotic fibrolipomatous tumor (HFLT), in pleomorphic hyalinizing angiectatic tumor (PHAT), and in rare tumors allegedly showing features of both HFLT and MIFS (hybrid HFLT-MIFS). These findings have led to speculation that HFLT, MIFS, PHAT, and hybrid HFLT-MIFS are closely related; however, areas resembling HFLTs are only very rarely encountered in previous series of MIFSs. We studied classic examples of these tumors with the goal of clarifying the relationship between MIFS and HFLT-MIFS. Cases of MIFS (n=31), hybrid HFLT-MIFS (n=8), PHAT (n=2), HFLT (n=1), and undifferentiated pleomorphic sarcoma (n=4) were retrieved from our archives, and the diagnoses were verified by 5 soft tissue pathologists. Using previously validated break-apart fluorescence in situ hybridization probes, we analyzed for TGFBR3 and MGEA5 rearrangements. Only 2 of 31 MIFSs harbored MGEA5 rearrangements; all lacked TGFBR3 rearrangements. Six of 8 hybrid HFLT-MIFSs harbored rearrangements of TGFBR3 and/or MGEA5. Both PHATs were positive for rearrangements of TGFBR3 and/or MGEA5. The HFLT was positive for rearrangements of both TGFBR3 and MGEA5. All undifferentiated pleomorphic sarcomas with focal myxoid change were negative. We conclude that (1) TGFBR3 and/or MGEA5 rearrangements are much more common in hybrid HFLT-MIFSs than in classic MIFSs, (2) HFLTs and MIFSs may be unrelated lesions, and (3) hybrid HFLT-MIFSs most likely represent HFLTs with sarcomatous progression, rather than tumors strictly related to classic MIFSs., (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Published
- 2016
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26. Physician scientist research pathway leading to certification by the American Board of Pathology.
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Weiss SW and Johnson RL
- Subjects
- Biomedical Research standards, Curriculum, Education, Nursing, Graduate standards, Humans, Pathology standards, United States, Accreditation standards, Biomedical Research education, Education, Nursing, Graduate methods, Internship and Residency standards, Pathology education, Specialty Boards standards
- Abstract
In 2014, the American Board of Pathology, in response to the pathology community, approved a physician scientist research pathway (PSRP). This brief report summarizes the history of and objectives for creating the physician scientist research pathway and the requirements of the American Board of Pathology for the certification of physician scientist research pathway trainees., (Copyright © 2016 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2016
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27. Epithelioid Schwannomas: An Analysis of 58 Cases Including Atypical Variants.
- Author
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Hart J, Gardner JM, Edgar M, and Weiss SW
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Biomarkers, Tumor analysis, Biopsy, Disease-Free Survival, Epithelioid Cells chemistry, Female, Humans, Immunohistochemistry, Male, Middle Aged, Mitosis, Mitotic Index, Muscle Neoplasms chemistry, Muscle Neoplasms therapy, Neoplasm Recurrence, Local, Neurilemmoma chemistry, Neurilemmoma therapy, Skin Neoplasms chemistry, Skin Neoplasms therapy, Stromal Cells pathology, Treatment Outcome, Tumor Burden, Young Adult, Epithelioid Cells pathology, Muscle Neoplasms pathology, Neurilemmoma pathology, Skin Neoplasms pathology
- Abstract
The histologic features and outcome of 58 cases of epithelioid schwannoma were studied to determine the significance of atypical histologic features. Cases were retrieved from personal consultation files from 1999 to 2013. Patients (31 male and 26 female patients) ranged in age from 14 to 80 years (median, 38 y). Two patients had schwannomatosis 1. Tumors developed in the dermis/subcutis (n=56) or muscle (n=2) of the upper extremity (34.5%), lower extremity (34.5%), thorax/abdomen/back (18%), and less common anatomic locations including the scalp, neck, lip, and breast. They ranged in size from 0.25 to 4.5 cm (median, 2.0 cm). Typically circumscribed and surrounded by a perineurium, they comprised single or small groups of epithelioid schwann cells with a moderate amphophilic cytoplasm and occasional nuclear pseudoinclusions. Stroma varied from myxoid to hyalinized, often with thick-walled vessels (55 cases). Mitotic rate ranged from 0 to 9 mitoses/10 high-power field (HPF) (2.37 mm) in the most active areas (mean, 2 to 3 mitoses/10 HPFs). Thirteen cases (22%) were "atypical," defined by a high mitotic rate (≥3 mitoses per 10 HPFs) and nuclear size variation (≥3:1). All (56/56) expressed S100 protein; type IV collagen invested groups or individual cells (16/17). Melanoma markers were negative, except for melan A (1 case). Follow-up in 39 patients (median, 78 mo; range, 6 to 174 mo) indicated that 31 (79%) were alive without disease (including 9/13 atypical cases; median, 78 mo), 7 (18%) were alive with unknown status, and 1 patient had died of unrelated causes. One tumor recurred, but none metastasized. Epithelioid schwannomas, even those with atypical features, are benign and do not constitute a histologic continuum with epithelioid malignant peripheral nerve sheath tumors, which typically occur in deep soft tissues and have more anaplastic features.
- Published
- 2016
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28. Child protection workers dealing with child abuse: The contribution of personal, social and organizational resources to secondary traumatization.
- Author
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Dagan SW, Ben-Porat A, and Itzhaky H
- Subjects
- Adult, Aged, Child, Preschool, Cross-Sectional Studies, Humans, Israel, Male, Middle Aged, Social Support, Surveys and Questionnaires, Child Abuse psychology, Child Protective Services, Social Workers psychology, Wounds and Injuries psychology
- Abstract
The present study compared secondary traumatization among child protection social workers versus social workers employed at social service departments. In addition, based on Conservation of Resources (COR) theory, the study examined the contribution of working in the field of child protection as well as the contribution of background variables, personal resources (mastery), and resources in the workers' social and organizational environment (social support, effectiveness of supervision, and role stress) to secondary traumatization. The findings indicate that levels of mastery and years of work experience contributed negatively to secondary traumatization, whereas exposure to child maltreatment, trauma history, and role stress contributed positively to secondary traumatization. However, no significant contribution was found for social support and effectiveness of supervision. The study identifies factors that can prevent distress among professionals such as child protection workers, who are exposed to the trauma of child abuse victims. Recommendations are provided accordingly., (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Published
- 2016
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29. MDM2 Amplification in Problematic Lipomatous Tumors: Analysis of FISH Testing Criteria.
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Clay MR, Martinez AP, Weiss SW, and Edgar MA
- Subjects
- Adult, Aged, Aged, 80 and over, Diagnosis, Differential, Female, Genetic Predisposition to Disease, Humans, Lipoma pathology, Lipoma surgery, Male, Middle Aged, Neoplasm Recurrence, Local, Phenotype, Predictive Value of Tests, Reproducibility of Results, Risk Factors, Tumor Burden, Young Adult, Biomarkers, Tumor genetics, Gene Amplification, In Situ Hybridization, Fluorescence, Lipoma genetics, Proto-Oncogene Proteins c-mdm2 genetics
- Abstract
To discriminate lipomas from atypical lipomatous tumor/well-differentiated liposarcoma (ALT/WDL) we perform fluorescence in situ hybridization (FISH) for MDM2 amplification in several problematic situations: "lipomas" >10 cm, lesions with equivocal atypia, recurrent "lipomas," all retroperitoneal/pelvic/abdominal "lipomas", and in cases not fitting the above criteria but having worrisome clinical or radiologic features. To ascertain the validity of these criteria, we have reviewed our experience with 301 consecutive differentiated lipomatous tumors in which the diagnosis of ALT could not be established on the basis of histologic sections and in which FISH was performed on the basis of the above criteria. The final diagnosis was based on MDM2 amplification status. Given the nature of this study to evaluate difficult lesions, most cases included (74%) were received in consultation. This enhanced our study series for borderline cases, and the data presented may not be generalizable to adipocytic tumors seen outside a subspecialty setting. Of 301 cases, 108 proved to be ALT/WDL (36%). The most common test indication was size >10 cm (n=187), followed by equivocal atypia (n=145), retroperitoneal/pelvic/abdominal location (n=86), recurrence (n=33), and clinical concern (n=12). Of the tumors >10 cm, 68 (36%) proved to be ALT/WDL, whereas the remainder were interpreted as lipoma or its variants (eg, spindle cell or pleomorphic lipoma). The 2 groups did not differ statistically in size, although ALTs consistently occurred in patients above 50 years of age. Of the cases with equivocal atypia, 72 (50%) proved to be ALT/WDL. Those in the retroperitoneum/abdomen/pelvis were ALT/WDL in 30 cases (35%), and those that had recurred were ALT in 18 cases (55%). Recurrence, atypia, and having multiple indications for testing were more common in ALT than in benign lesions (P=0.02, 0.0001, 0.0012, respectively). No ALT/WDL occurred in the hands and feet, and only a single ALT/WDL was superficial (1 ALT/WDL vs. 60 lipoma/spindle cell or pleomorphic lipoma). Small (<10 cm) retroperitoneal tumors without additional features were always benign (n=9). On the basis of our results, FISH testing is recommended for: (1) recurrent lesions; (2) deep extremity lesions that are >10 cm in patients over 50 years of age; (3) in cases with equivocal atypia; (4) in lesions of the retroperitoneum/pelvis/abdomen, and in special clinical situations as directed by treating clinicians. Testing is low yield in superficial lesions, in small extremity lesions without additional indicators for testing, in large extremity lesions without additional features in patients under the age of 50, and in lesions arising in the hands/feet. More evidence is needed regarding testing in small retroperitoneal lesions without additional features. By adopting these criteria, we could have avoided testing 74 cases, missing a single superficial ALT/WDL.
- Published
- 2015
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30. Emergence of stereotactic body radiation therapy.
- Author
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Behrend SW
- Subjects
- Humans, Neoplasms surgery, Radiosurgery
- Abstract
Stereotactic body radiation therapy (SBRT) evolved from the application of stereotactic radiosurgery, which is focused intracranial radiation. SBRT offers high doses of specific radiation with oligofractions (five or less) to a specified target, providing local control to circumscribed tumors while sparing surrounding normal tissue. Commonly treated cancers include tumors of the lung and liver. The challenge with SBRT is to account for organ motion and the achievement of precise targeting. SBRT uses three-dimensional radiation therapy planning, intensity-modulated radiation therapy, as well as image-guided organ motion and gating. SBRT is based on the premise of geometric avoidance, targeting the tumor with the goal of complete avoidance of the surrounding normal tissues and critical organs. An SBRT course of treatment ranges from one to five treatments (hypofractionated) and, therefore, differs from conventional radiation, which is usually a prolonged course ranging from two to six weeks of daily treatment.
- Published
- 2015
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31. Myofibromas with atypical features: expanding the morphologic spectrum of a benign entity.
- Author
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Linos K, Carter JM, Gardner JM, Folpe AL, Weiss SW, and Edgar MA
- Subjects
- Adult, Biomarkers, Tumor analysis, Child, Female, History, 15th Century, History, Medieval, Humans, Immunohistochemistry, Infant, Infant, Newborn, Male, Middle Aged, Young Adult, Myofibroma pathology
- Abstract
Typical myofibromas are biphasic tumors composed of a central zone of immature spindled to rounded cells arranged in a pericytic pattern and a peripheral zone of myoid nodules. Central necrosis is occasionally seen. A small but undefined subset of myofibromas displays atypical features that may lead to a misdiagnosis of sarcoma. To more completely characterize these tumors and define their behavior, we analyzed our experience with myofibromas having 1 or more atypical features including hypercellularity, absent or inconspicuous, poorly demarcated myoid nodules, infiltrative growth pattern, and perineural invasion. Of 266 cases of myofibromas, 24 cases were retrieved on the basis of pathology reports in which atypical features were mentioned. The tumors presented in 16 male and 8 female individuals (mean age 17 y; range, 2 wk to 62 y) as masses of variable size (mean 3.0 cm; range, 1.5 to 6.5 cm). Fourteen cases arose on the head and neck and 10 cases on the limbs. The referring or suspected diagnosis was sarcoma in 8 cases. The tumors were typically more cellular than ordinary myofibroma with levels of cellularity similar to that expected in fibrosarcoma (22/24). In addition, they displayed inconspicuous, loosely cohesive (22/24) or absent myoid nodules (2/24), infiltrating borders (19/24), intravascular growth (5/24), and perineural invasion/nerve entrapment (6/24). The mean mitotic rate was 5 mitoses/10 high-power fields, but no tumor showed significant cytologic atypia. The tumors were positive for actins (11/11) and CD34 (2/8). Follow-up in 14 patients revealed no distant metastases. We conclude that a small subset of myofibromas shows atypical features that complicate the diagnosis but do not adversely affect outcome.
- Published
- 2014
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32. Television viewing and time spent sedentary in relation to cancer risk.
- Author
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Behrend SW
- Subjects
- Humans, Risk Factors, Time Factors, Neoplasms epidemiology, Sedentary Behavior, Television statistics & numerical data
- Published
- 2014
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33. New guidelines for chemotherapy-induced peripheral neuropathy.
- Author
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Behrend SW
- Abstract
The focus of this column is to present topics of interest from a variety of journals to Oncology Nursing Forum readers. The topic of this issue is the release of new and adapted survivorship guidelines from the American Society of Clinical Oncology.
- Published
- 2014
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34. Survivorship care plans.
- Author
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Behrend SW
- Abstract
The purpose of this pilot study was to test the feasibility of a telephone counseling program for cancer survivors. The Cancer Survivor Telephone Education and Personal Support (C-STEPS) program was developed to address psychosocial and health behavior outcomes among cancer survivors. According to Garrett et al. (2013), this was the first telephone counseling intervention to simultaneously address psychosocial and health behavior in this patient population.
- Published
- 2014
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35. Synthetic biology: Missing the point.
- Author
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Evans SW
- Subjects
- Policy Making, Synthetic Biology trends
- Published
- 2014
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36. Patients with primary brain tumors.
- Author
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Behrend SW
- Subjects
- Adult, Aged, Aged, 80 and over, Chemotherapy, Adjuvant adverse effects, Cognition Disorders chemically induced, Female, Humans, Lomustine adverse effects, Lomustine therapeutic use, Male, Middle Aged, Procarbazine adverse effects, Procarbazine therapeutic use, Prospective Studies, Vincristine adverse effects, Vincristine therapeutic use, Young Adult, Antineoplastic Combined Chemotherapy Protocols adverse effects, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Brain Neoplasms drug therapy, Brain Neoplasms radiotherapy, Glioma drug therapy, Glioma radiotherapy
- Abstract
The purpose of this prospective phase II/III trial was to study the effect of therapy intensification when combining procarbazine, lomustine, and vincristine (PCV) chemotherapy with a standard course of radiation therapy (RT) on cognitive functioning for patients with World Health Organization grade 2 low-grade gliomas (LGGs). Initial results of the trial demonstrated a progression-free survival benefit with adjuvant PCV, but no overall survival benefit in the intention-to-treat analysis. Because patients with LGGs have favorable prognostic indicators, the five-year overall survival rates range from 60%-70%. The effect of cancer treatment on neurocognitive function is a topic of increasing interest to healthcare providers and patients. The negative effect is commonly called "chemobrain" and refers to diminished concentration and compromised short-term memory following treatment. Chemobrain has been studied in other populations of patients with cancer (e.g., breast cancer) with associated statistically significant chemotherapy-associated compromised cognitive function when chemotherapy was added to RT.
- Published
- 2014
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37. Superficial CD34-positive fibroblastic tumor: report of 18 cases of a distinctive low-grade mesenchymal neoplasm of intermediate (borderline) malignancy.
- Author
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Carter JM, Weiss SW, Linos K, DiCaudo DJ, and Folpe AL
- Subjects
- Adult, Aged, Biomarkers, Tumor analysis, Female, Fibroma genetics, Humans, Immunohistochemistry, In Situ Hybridization, Fluorescence, Male, Mesoderm pathology, Middle Aged, Neoplasm Grading, Young Adult, Antigens, CD34 biosynthesis, Fibroma metabolism, Fibroma pathology, Neoplasms, Connective and Soft Tissue metabolism
- Abstract
Fibroblastic mesenchymal tumors show a spectrum of biological behavior, from benign to fully malignant. We report our experience of two decades with a distinctive, previously undescribed low-grade fibroblastic tumor of the superficial soft tissues. Eighteen cases were identified within our consultation files, previously coded as 'low-grade sarcoma, not further classified' and 'malignant fibrous histiocytoma, low grade'. The tumors occurred in adults (median age 38 years, range 20-76 years) of either sex (10 males and 8 females), ranged in size from 1.5 to 10 cm (mean 4.1 cm), and were confined to the superficial soft tissues of the thigh (N=5), knee (N=2), and other sites. Histological features included a fascicular growth pattern of the neoplastic spindled cells with striking, often bizarre cellular pleomorphism and variably prominent nucleoli. Necrosis was seen in one case. All cases showed strong, diffuse CD34 positivity and 68% of tested cases demonstrated focal cytokeratin expression. Desmin, ERG, FLI-1, smooth muscle actin, and S100 protein were negative. TP53 overexpression was absent. Fluorescence in-situ hybridization studies for TGFBR3 and/or MGEA5 rearrangements were negative in all tested cases. Clinical follow-up was available in 13 patients (median duration of 24 months; range 1-104 months). Twelve of 13 patients had no disease recurrence. One patient had regional lymph node metastases, 7 years after incomplete excision of the primary tumor. All patients are currently alive and disease free. The unique clinicopathological features of superficial CD34-positive fibroblastic tumor define them as a novel subset of low-grade fibroblastic neoplasms, best considered to be of borderline malignancy.
- Published
- 2014
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38. Update on … patient education and counseling.
- Author
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Behrend SW
- Subjects
- Female, Humans, Male, Communication, Internal-External Control, Neoplasms psychology, Patient Preference psychology, Truth Disclosure
- Published
- 2014
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39. Cardiovascular rehabilitation, ballroom dancing and sexual dysfunction.
- Author
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Carvalho Td, Gonzáles AI, Sties SW, and Carvalho GM
- Subjects
- Female, Humans, Male, Cardiac Rehabilitation, Dancing psychology, Exercise physiology, Sexual Dysfunction, Physiological physiopathology
- Published
- 2013
- Full Text
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40. PHF1 rearrangements in ossifying fibromyxoid tumors of soft parts: A fluorescence in situ hybridization study of 41 cases with emphasis on the malignant variant.
- Author
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Graham RP, Weiss SW, Sukov WR, Goldblum JR, Billings SD, Dotlic S, and Folpe AL
- Subjects
- Biopsy, Bone Neoplasms pathology, Female, Fibroma, Ossifying pathology, Humans, Male, Middle Aged, Polycomb-Group Proteins, Soft Tissue Neoplasms pathology, Bone Neoplasms genetics, DNA-Binding Proteins genetics, Fibroma, Ossifying genetics, Gene Rearrangement, In Situ Hybridization, Fluorescence, Soft Tissue Neoplasms genetics, Transcription Factors genetics
- Abstract
Ossifying fibromyxoid tumor of soft parts (OFMT) is a rare soft tissue neoplasm of uncertain differentiation. Very recently recurrent rearrangements of the PHF1 gene have been reported in OFMT, including typical, atypical, and malignant variants. We sought to validate and extend these findings in a larger series of well-characterized OFMT, in particular malignant variants. Slides and blocks from 41 OFMT were retrieved, rereviewed, and classified as typical, atypical, and malignant using previously published criteria. Interphase fluorescence in situ hybridization (FISH) was performed on paraffin-embedded sections of each case using a break-apart probe strategy, with direct-labeled FISH probes designed from bacterial artificial chromosomes. The 41 tumors occurred in 23 men and 18 women with a mean age of 55 years and involved the head and neck, trunk, and upper and lower limbs. The tumors were classified as typical (n=14), atypical (n=6) and malignant (n=21). PHF1 rearrangements were detected in 20 of 41 cases (49%) including 43% typical, 50% atypical, and 52% malignant cases. The results of our study confirm previous findings, with PHF1 rearrangements present in nearly 50% of OFMT, including roughly similar percentages of typical, atypical, and malignant tumors. These results support our previous hypothesis that OFMT might represent a translocation-associated tumor, underscore the likely importance of PHF1 rearrangements in the pathogenesis of these lesions, confirm the relationship between typical and malignant OFMT, and suggest a role for PHF1 FISH in the diagnosis of morphologically challenging cases.
- Published
- 2013
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41. The General Surgeon's quandary: atypical lipomatous tumor vs lipoma, who needs a surgical oncologist?
- Author
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Fisher SB, Baxter KJ, Staley CA 3rd, Fisher KE, Monson DK, Murray DR, Oskouei SV, Weiss SW, Kooby DA, Maithel SK, and Delman KA
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Cohort Studies, Diagnosis, Differential, Female, Humans, Male, Middle Aged, Neoplasms, Adipose Tissue diagnosis, Neoplasms, Adipose Tissue surgery, Referral and Consultation, Retrospective Studies, Young Adult, Lipoma diagnosis, Lipoma surgery, Medical Oncology, Specialties, Surgical
- Abstract
Background: Differentiating large lipomas from atypical lipomatous tumors (ALT) is challenging, and preoperative management guidelines are not well defined. The diagnostic ambiguity leads many surgeons to refer all patients with large lipomatous masses to an oncologic specialist, perhaps unnecessarily., Study Design: In this retrospective cohort study of patients with nonretroperitoneal lipomatous tumors, preoperative characteristics discernible without invasive diagnostic procedures were evaluated for diagnostic predictive value., Results: We identified 319 patients (256 with lipomas, 63 with ALTs) treated between 1994 and 2012. Patients with ALTs were older (60.5 vs 53.5 years, p < 0.0001), had larger tumors (16.0 vs 8.3 cm, p < 0.0001), had tumors more often located on an extremity (88.9% vs 60.5% torso, p < 0.0001), and more frequently had a history of previous operations at the same site, exclusive of excision leading to diagnosis and referral (20.6% vs 5.9%, p = 0.001). Local recurrence was observed in 2 patients with lipomas (0.8%) vs 14 with ALTs (22.6%, p < 0.0001). No patients with ALTs developed distant metastases or disease-specific mortality, with a median follow-up of 27.4 months (range 0 to 164.6 months). On multivariate analysis, age ≥ 55 years, tumor size ≥ 10 cm, extremity location, and history of previous resections were predictors for diagnosis of ALT (p < 0.05)., Conclusions: Characteristics of lipomatous masses associated with a diagnosis of ALT include patient age ≥ 55 years, tumor size ≥ 10 cm, previous resection, and extremity location (vs torso). These easily identifiable traits may guide surgical management or referral to a specialist., (Copyright © 2013 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2013
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42. Update on … non-small cell lung cancer.
- Author
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Behrend SW
- Published
- 2013
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43. Fibrosarcoma-like lipomatous neoplasm: a reappraisal of so-called spindle cell liposarcoma defining a unique lipomatous tumor unrelated to other liposarcomas.
- Author
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Deyrup AT, Chibon F, Guillou L, Lagarde P, Coindre JM, and Weiss SW
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Biomarkers, Tumor analysis, Biomarkers, Tumor genetics, Biopsy, Cell Dedifferentiation, Comparative Genomic Hybridization, Female, Fibrosarcoma chemistry, Fibrosarcoma classification, Fibrosarcoma genetics, Fibrosarcoma therapy, Humans, Immunohistochemistry, Lipoma chemistry, Lipoma classification, Lipoma genetics, Lipoma therapy, Liposarcoma chemistry, Liposarcoma classification, Liposarcoma genetics, Liposarcoma therapy, Male, Middle Aged, Neoplasm Grading, Prognosis, Tumor Burden, Young Adult, Fibrosarcoma pathology, Lipoma pathology, Liposarcoma pathology, Terminology as Topic
- Abstract
The term "spindle cell liposarcoma" has been applied to liposarcomas (LPSs) composed predominantly or exclusively of spindled cells. These tumors have been considered variants of well-differentiated LPS (WDL), myxoid LPS, and spindle cell lipoma, suggesting that this is a heterogenous group of lesions. Using strict morphologic criteria and molecular and immunohistochemical analyses, we have identified a homogenous group of spindle cell lipomatous tumors, histologically and genetically distinct from other forms of LPS, which we have called "fibrosarcoma-like lipomatous neoplasm." Cases classified as "spindle cell LPS" or "low-grade LPS with spindle cell features" were reviewed. Final selection criteria included: (1) an exclusive low-grade spindle cell component resembling fibrosarcoma; (2) a mixture of bland fibroblastic cells resembling the preadipocyte and early-adipocyte stage of embryonic fat; and (3) molecular-genetic analysis that excluded other forms of lipomatous tumors. Of the initial 25 cases identified, comparative genomic hybridization (CGH) was uninformative in 2 cases; 5 were reclassified as WDL on the basis of molecular data (MDM2 amplification) and 6 as spindle cell lipoma (CGH profiles with a few gains and losses including a constant loss of chromosome 13 and frequent losses of chromosomes 16 and 6). The 12 remaining cases showed flat CGH profiles; of these cases, 11 were negative for DDIT3 gene rearrangements, and 1 result was uninterpretable. Patients ranged in age from 15 to 82 years (mean 50 y); male patients were affected slightly more often (7:5). Tumors arose in the deep (6) and superficial (3) soft tissue of the groin (4), buttock (3), thigh (2), flank (1), shoulder (1), and paratesticular tissue (1) and ranged in size from 2 to 20 cm (mean 7.5 cm). Clinical follow-up in 11 patients (9 mo to 20 y; mean 68 mo) showed no recurrences or metastases. As defined above, "fibrosarcoma-like lipomatous neoplasm" is a unique lipomatous tumor that should be distinguished from WDL/(low-grade) dedifferentiated LPS and myxoid LPS on combined histologic/molecular features because of its better prognosis.
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- 2013
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44. Validation of the International Index of Erectile Function (IIFE) for use in Brazil.
- Author
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Gonzáles AI, Sties SW, Wittkopf PG, Mara LS, Ulbrich AZ, Cardoso FL, and Carvalho Td
- Subjects
- Brazil, Cross-Sectional Studies, Cultural Characteristics, Erectile Dysfunction physiopathology, Humans, Language, Male, Middle Aged, Psychometrics, Reproducibility of Results, Risk Factors, Severity of Illness Index, Socioeconomic Factors, Cardiovascular Diseases physiopathology, Cross-Cultural Comparison, Erectile Dysfunction diagnosis, Lung Diseases physiopathology, Metabolic Diseases physiopathology, Surveys and Questionnaires
- Abstract
Background: The International Index of Erectile Function has been proposed as a method for assessing sexual function assisting the diagnosis and classification of erectile dysfunction. However, IIEF was not validated for the Portuguese language., Objective: Validate the International Index of Erectile Function in patients with cardiopulmonary and metabolic diseases., Methods: The sample consisted of 108 participants of to Cardiopulmonary and Metabolic program Rehabilitation (CPMR) in southern Brazil. The clarity assessment of the instrument was performed using a scale ranging from zero to 10. The construct validity was carried out by confirmatory factor analysis (KMO = 0.85; Barllet p < 0.001), internal consistency by Cronbach's alpha and reproducibility and interrater reliability via the test retest method., Results: The items were considered very clear with averages superior to 9. The internal consistency resulted in 0.89. The majority of items related correctly with their domains, with exception of three questions from sexual satisfaction domain, and one from erectile function. All items showed excellent stability of measure and substantial to almost perfect agreement., Conclusion: The present study showed that the IIEF is valid and reliable for use in participants of a cardiopulmonary and metabolic rehabilitation program.
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- 2013
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- View/download PDF
45. Soft tissue chordomas: a clinicopathologic analysis of 11 cases.
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Lauer SR, Edgar MA, Gardner JM, Sebastian A, and Weiss SW
- Subjects
- Adolescent, Adult, Aged, Chordoma metabolism, Female, Fetal Proteins analysis, Fetal Proteins biosynthesis, Humans, Immunohistochemistry, Male, Middle Aged, Soft Tissue Neoplasms metabolism, T-Box Domain Proteins analysis, T-Box Domain Proteins biosynthesis, Young Adult, Biomarkers, Tumor analysis, Chordoma pathology, Soft Tissue Neoplasms pathology
- Abstract
Soft tissue chordomas (STCs) have never been systematically studied because of their rarity and the difficulty in separating them from similar-appearing lesions. Using brachyury to confirm the diagnosis, we have analyzed our experience with 11 cases. Cases coded as "chordoma" or "parachordoma" were retrieved from institutional and consultation files (1989 to 2011) and were excluded from further analysis if they arose from the bone or in a patient with previous axial chordoma. Eleven of 27 cases met inclusion criteria. Patients (8 male; 3 female) ranged in age from 13 to 71 years (mean 44 y). Tumors were located on the buttock (n=2), wrist (n=2), leg (n=2), toe (n=1), thumb (n=1), ankle (n=1), shoulder (n=1), and chest wall (n=1), ranged in size from 0.5 to 10.9 cm (mean 5.3 cm), and consisted of cords and syncytia of spindled/epithelioid cells with vacuolated eosinophilic cytoplasm and a partially myxoid background. Tumors expressed brachyury (10/10), 1 or more cytokeratins (11/11), and S100 protein (10/11). Follow-up information was available for 10 patients (69 mo; range, 2 to 212 mo). Most (n=6) were alive without disease, 2 developed local recurrence and lung metastases, and 1 developed lung metastasis only. One died with unknown disease status. STCs are histologically identical to osseous ones, but differ in their greater tendency to occur in distal locations where small size and surgical resectability result in better disease control. The existence of STC implies that notochordal remnants are not a prerequisite for chordoma development.
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- 2013
- Full Text
- View/download PDF
46. Update on … environmental carcinogens.
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Behrend SW
- Subjects
- Humans, Neoplasms prevention & control, Neoplasms, Radiation-Induced prevention & control, Patient Education as Topic, Risk Factors, Carcinogens, Environmental toxicity, Neoplasms epidemiology, Neoplasms nursing, Neoplasms, Radiation-Induced epidemiology, Neoplasms, Radiation-Induced nursing, September 11 Terrorist Attacks
- Published
- 2013
- Full Text
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47. Treatment and outcomes for chronic myelomonocytic leukemia compared to myelodysplastic syndromes in older adults.
- Author
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Zandberg DP, Huang TY, Ke X, Baer MR, Gore SD, Smith SW, and Davidoff AJ
- Subjects
- Acute Disease, Aged, Aged, 80 and over, Disease Progression, Drug Therapy methods, Erythrocyte Transfusion methods, Female, Hematopoietic Stem Cell Transplantation methods, Humans, Kaplan-Meier Estimate, Leukemia, Myeloid pathology, Leukemia, Myelomonocytic, Chronic pathology, Logistic Models, Male, Medicare statistics & numerical data, Middle Aged, Multivariate Analysis, Myelodysplastic Syndromes pathology, Patient Outcome Assessment, Prognosis, Proportional Hazards Models, SEER Program statistics & numerical data, United States, Leukemia, Myeloid therapy, Leukemia, Myelomonocytic, Chronic therapy, Myelodysplastic Syndromes therapy
- Abstract
Prior studies have investigated patients' characteristics, treatments, and outcomes for older adults with myelodysplastic syndromes, but most failed to distinguish chronic myelomonocytic leukemia. Recognizing potentially important differences between the diseases, we undertook a population-based comparison of baseline characteristics, treatments, and outcomes between older adults with chronic myelomonocytic leukemia and myelodysplastic syndromes. The patients' data were obtained from Surveillance Epidemiology and End Results registry data from 2001-2005, linked to Medicare claims. Baseline characteristics, treatment (red blood cell transfusions, hematopoietic growth factors, hypomethylating agents, chemotherapy or transplantation), progression to acute myeloid leukemia, and overall survival were compared using bivariate techniques. Multivariate logistic regression estimated differences in treatments received. Cox proportional hazard models estimated the effects of chronic myelomonocytic leukemia relative to myelodysplastic syndromes on progression-free survival. A larger proportion of patients with chronic myelomonocytic leukemia (n=792), compared to patients with myelodysplastic syndromes (n=7,385), failed to receive any treatment (25% versus 15%; P<0.0001), or only received red blood cell transfusions (19.8% versus 16.7%; P=0.037). A larger percentage of patients with chronic myelomonocytic leukemia progressed to acute myeloid leukemia (42.6% versus 15.5%, respectively; P<0.0001), with shorter time to progression. Chronic myelomonocytic leukemia patients had a shorter median survival (13.3 versus 23.3 months; P<0.0001) and lower 3-year survival rate (19% versus 36%; P<0.0001). Adjusted estimates, controlling for baseline characteristics and selected treatments, indicate that chronic myelomonocytic leukemia was associated with an increased risk of progression to acute myeloid leukemia or death (HR 2.22; P<0.0001), compared to myelodysplastic syndromes. In conclusion, chronic myelomonocytic leukemia is less frequently treated in older adults and is associated with worse outcomes, even after controlling for the patients' baseline characteristics and selected treatments. Our data suggest the need for continued evaluation of the biological differences between these diseases and clinical trials targeting chronic myelomonocytic leukemia.
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- 2013
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48. Cannabinoids may be therapeutic in breast cancer.
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Behrend SW
- Subjects
- Animals, Breast Neoplasms nursing, Female, Humans, Nausea chemically induced, Nausea nursing, Oncology Nursing, Vomiting chemically induced, Vomiting nursing, Antineoplastic Agents adverse effects, Breast Neoplasms drug therapy, Cannabinoids therapeutic use, Nausea drug therapy, Vomiting drug therapy
- Published
- 2013
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49. A review of safety, efficacy, and utilization of erythropoietin, darbepoetin, and peginesatide for patients with cancer or chronic kidney disease: a report from the Southern Network on Adverse Reactions (SONAR).
- Author
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Bennett CL, Spiegel DM, Macdougall IC, Norris L, Qureshi ZP, Sartor O, Lai SY, Tallman MS, Raisch DW, Smith SW, Silver S, Murday AS, Armitage JO, and Goldsmith D
- Subjects
- Darbepoetin alfa, Erythropoietin adverse effects, Humans, Peptides adverse effects, Erythropoietin analogs & derivatives, Erythropoietin therapeutic use, Neoplasms drug therapy, Peptides therapeutic use, Renal Insufficiency, Chronic drug therapy
- Abstract
The erythropoiesis-stimulating agents (ESAs) erythropoietin and darbepoetin prevent transfusions among chemotherapy-associated anemia patients. Clinical trials, meta-analyses, and guidelines identify mortality, tumor progression, and venous thromboembolism (VTE) risks with ESA administration in this setting. Product labels advise against administering ESAs with potentially curative chemotherapy (United States) or to conduct risk-benefit assessments (Europe/Canada). Since 2007, fewer chemotherapy-associated anemia patients in the United States and Europe receive ESAs. ESAs and the erythropoietin receptor agonist peginesatide prevent transfusions among chronic kidney disease (CKD) patients; clinical trials, guidelines, and meta-analyses demonstrate myocardial infarction, stroke, VTE, or mortality risks with ESAs targeting high hemoglobin levels. U.S. labels recommend administering ESAs or peginesatide at doses sufficient to prevent transfusions among dialysis CKD patients. For dialysis CKD patients, Canadian and European labels recommend targeting hemoglobin levels of 10 to 12 g/dL and 11 to 12 g/dL, respectively, with ESAs. ESA utilization for dialysis CKD patients has decreased in the United States., (Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.)
- Published
- 2012
- Full Text
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50. Cutaneous and subcutaneous pleomorphic liposarcoma: a clinicopathologic study of 29 cases with evaluation of MDM2 gene amplification in 26.
- Author
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Gardner JM, Dandekar M, Thomas D, Goldblum JR, Weiss SW, Billings SD, Lucas DR, McHugh JB, and Patel RM
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Cell Differentiation, Child, Child, Preschool, Female, Genetic Predisposition to Disease, Humans, In Situ Hybridization, Fluorescence, Liposarcoma enzymology, Liposarcoma pathology, Male, Middle Aged, Mitotic Index, Necrosis, Neoplasm Recurrence, Local, Phenotype, Prognosis, Skin Neoplasms enzymology, Skin Neoplasms pathology, Time Factors, United States, Young Adult, Gene Amplification, Liposarcoma genetics, Proto-Oncogene Proteins c-mdm2 genetics, Skin Neoplasms genetics
- Abstract
Pleomorphic liposarcoma (PL) is an uncommon form of liposarcoma that rarely occurs in the skin and subcutis. As its behavior in this setting is incompletely characterized, we undertook a study of a series of superficial PLs, defined as those arising or based primarily in the dermis and/or subcutis without involvement of deep structures. In addition, MDM2 gene amplification, a diagnostic signature of well-differentiated/dedifferentiated liposarcoma (WDL/DL), was evaluated to address the recent observation that this gene is amplified within PL-like areas in DL. PLs were obtained from institutional and consultation files (n=29). Cases were evaluated with respect to age, sex, location (dermis, dermis and subcutis, subcutis), size, predominant pattern (pleomorphic spindled or epithelioid), extent of lipogenic differentiation, and tumor necrosis. MDM2 amplification was analyzed using FISH on formalin-fixed, paraffin-embedded material in 26 cases. Patients ranged in age from 5 to 93 years (M:F=1.4:1). Tumors were located on the extremity (n=15), trunk (n=7), and head and neck (n=7) and involved the dermis (n=4), dermis and subcutis (n=10), and subcutis (n=15). Tumor size ranged from 0.8 to 15 cm (median=2 cm). All were mitotically active high-grade sarcomas [FNCLCC grade 2 (n=23) or 3 (n=6)] with either a pleomorphic spindled (n=24) or an epithelioid pattern (n=5) with variable extent of lipogenic differentiation [<25% (n=15), 25% to 50% (n=9), >50% (n=5)]. Necrosis was present in 3 cases. MDM2 gene amplification was present in 3 of 26 cases. Follow-up information in 24 cases (range=1 to 192 mo; median=48 mo; mean=59 mo) revealed local recurrences (4/24) but no metastasis or death from disease. We conclude that cutaneous and subcutaneous PLs, despite their high grade, have a much more favorable outcome compared with their deep-seated counterparts, most likely attributed to their small size and superficial location. The low incidence of MDM2 gene amplification in our series indicates that most superficial PLs are unrelated to WDL/DL. PL likely evolves by way of more than 1 molecular pathway.
- Published
- 2012
- Full Text
- View/download PDF
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