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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Modulation of Transforming Growth Factor (TGF)-[beta]1 and its implications in breast cancer metastasis

Moore, Lakisha Dionne. January 2008 (has links) (PDF)
Thesis (Ph. D.)--University of Alabama at Birmingham, 2008. / Title from first page of PDF file (viewed Sept. 16, 2008). Includes bibliographical references (p. 98-107).
22

Analysis of prognostic factors for the development of metastases and survival in renal cell carcinoma patients.

Cheng, Jed-Sian. Klos, Kathy L. Risser, William. Fernandez, Maria E. January 2008 (has links)
Thesis (M.P.H.)--University of Texas Health Science Center at Houston, School of Public Health, 2008. / Source: Masters Abstracts International, Volume: 46-05, page: 2666. Adviser: Kathy L. Klos. Includes bibliographical references.
23

Characterization of peptides and phage that bind galectin-3 selected from bacteriophage display libraries a study of the role of galectin-3 in metastasis-associated cancer cell adhesion /

Zou, Jun, January 2005 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2005. / "December 2005" The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Vita. Includes bibliographical references.
24

Fatores prognósticos no tratamento cirúrgico de pacientes com metástases pulmonares de sarcoma de partes moles / Pulmonary metastasectomy from soft tissue sarcomas: factors affecting survival

Rodrigo Afonso da Silva 31 August 2010 (has links)
Metastases pulmonares isoladas de sarcomas de partes moles ocorrem em 20%-50% dos pacientes, e 70% destes pacientes apresentarão doença limitada aos pulmões. A ressecção cirúrgica é bem aceita como tratamento padrão nas metastases de sarcomas de partes moles confinadas aos pulmões, com muitos estudos relatando sobrevida em cinco anos de 305-40%, ssndo que o fator preditor de sobrevida é a ressecção completa. O objetivo deste estudo é determinar as variáveis clínicas e demográficas relacionadas ao tratamento e associadas com a sobrevida global a longo prazo (90 meses) nos pacientes submetidos a metastasectomia pulmonar de sarcomas de partes moles. Uma revisão retrospectiva foi realizada nos pacientes com metastases pulmonares que foram submetidos à toracotomia para ressecção das metástases, após o tratamento do tumor primário. Os dados foram coletados de acordo com as características do tumor primário, dados demográficos, tipo de tratamento e evolução. Pacientes (n=77) com sarcomas de partes moles previamente tratados foram submetidos a um total of 122 toracotomias e 273 nódulos ressecados. O seguimento mediando de todos os pacientes foi de 36.7 meses (variação: 10-138 meses). O índice de complicações pós-peratórias foi 9.1%, e a mortalidade em 30 dias de 0%. A sobrevida global em 90 meses para todos os pacientes foi de 34.7%. A análise multivariada identificou o número de metástases, o intervalo livre de doença, e ressecção completa, como fatores prognósticos independentes para a sobrevida global. Estes resultados confirmam que a metastasectomia pulmonar é um procedimento seguro e com potencial curativo para pacientes com tumors primários tratados. Um grupo seleto de pacientes pode apresentar uma sobrevida a longo prazo interessante após a ressecção pulmonar / Isolated pulmonary metastases from soft tissue sarcomas occur in 20%-50% of these patients, and 70% of these patients will have disease limited only to the lungs. Surgical resection is well accepted as a standard approach to treat metastases from soft tissue sarcomas isolated to the lungs, with many studies reporting overall 5-year survival ranging from 30% to 40%, and the most consistent predictor of survival in these patients is complete resection. The aim of this study is to determine demographics and clinical treatment-related variables associated with long-term (90-month) overall survival in patients with lung metastases undergoing pulmonary metastasectomy from soft tissue sarcomas. A retrospective review was performed of patients who were admitted with lung metastases and underwent thoracotomy for resection, after treatment of the primary tumor. Data were collected regarding primary tumor features, demographics, treatment, and outcome. Patients (n=77) with preview soft tissue sarcomas treated, were submitted to a total of 122 thoracotomies and 273 nodules resected. Median follow-up time of all patients was 36.7 months (range: 10-138 months). The postoperative complication rate was 9.1%, and the 30-day mortality rate was 0%. The 90-month overall survival rate for all patients was 34.7%. Multivariate analysis identified the number of metastases resected, disease-free interval, and complete resection as the independent prognostic factors for overall survival. These results confirm that lung metastasectomy is a safe and potentially curative procedure for patients with treated primary tumors. A select group of patients can achieve long-term survival after lung resection
25

Fatores prognósticos de pacientes com metástase de carcinoma de mama no fêmur tratadas cirurgicamente / Prognostic factors in patients with breast cancer metastasis in the fêmur treated surgically

Mouraria, Guilherme Grisi, 1979- 20 August 2018 (has links)
Orientador: Maurício Etchebehere / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-20T07:16:01Z (GMT). No. of bitstreams: 1 Mouraria_GuilhermeGrisi_M.pdf: 1020067 bytes, checksum: 911879a0f520b1816324bfcb8b9f71d7 (MD5) Previous issue date: 2012 / Resumo: O carcinoma de mama é a neoplasia mais frequente no mundo desenvolvido e a segunda mais frequente no Brasil. O diagnóstico tardio da doença é associado frequentemente com a presença de metástases ósseas. No esqueleto apendicular, o fêmur é o local mais acometido. As lesões femorais muitas vezes levam a fratura. Fatores prognósticos na mortalidade de pacientes com metástase óssea oriundas de neoplasias em geral estão relatados na literatura. Entretanto, não há relato específico de fatores prognósticos nas pacientes com metástases de neoplasia de mama no fêmur submetidas a tratamento cirúrgico. A determinação dos fatores prognósticos em portadores de metástase óssea auxilia na decisão terapêutica para cada paciente. O objetivo do estudo foi determinar os fatores clínicos e ortopédicos relacionados à mortalidade nesta coorte de pacientes. O estudo retrospectivo incluiu quarenta e um pacientes submetidos a tratamento cirúrgico da metástase femoral. Foram analisadas as seguintes variáveis: número e local das metástases ósseas e viscerais, presença de fratura patológica no fêmur, técnica cirúrgica empregada e exames laboratoriais (hematócrito, hemoglobina, ureia e creatinina). Tais fatores foram correlacionados com a mortalidade utilizando-se o método de COX de regressão logística multivariada e também a construção de curvas de mortalidade de Kaplan Meier testada pelo método de log-rank. O tempo de seguimento médio foi de 37 meses. Houve alta prevalência de múltiplas metástases associadas a fraturas patológicas no momento do ato cirúrgico. A mortalidade foi elevada e precoce. A localização subtrocantérica e distal, a presença de fratura, presença de anemia e alteração na função renal associaram-se a maior mortalidade. O tipo de implante, o número de metástase óssea e a presença de metástase em outros órgãos não influenciaram na mortalidade. Conclui-se que as lesões metastáticas no fêmur devem ser tratadas cirurgicamente o mais rapidamente possível, independentemente do implante utilizado, para evitar a fratura / Abstract: Breast carcinoma is a common malignancy in the developed world and in Brazil. Late diagnosis of the disease is frequently associated with bone metastasis. In the appendicular skeleton, the femur is most commonly affected. The lesions often lead to femoral fractures. Prognostic factors of mortality in patients with bone metastases originating from cancers in general have been reported. However, there is no specific report of prognostic factors in relation to breast cancer metastasis in the femur surgically treated. The determination of prognostic factors in patients with bone metastasis can assist in therapeutic decisions for each patient. The aim of this study was to determine clinical and orthopedic factors related to mortality in patients with breast cancer and metastases to the femur underwent surgical treatment. This was a retrospective cohort study and included 41 patients undergoing surgical treatment of femoral metastases. We analyzed the following variables: number and location of bone metastases, visceral metastases, presence of pathological fracture, fixation method, and laboratory tests. These factors were correlated with mortality using Cox multivariate logistic regression and Kaplan-Meier curves. The average follow-up was 37 months. There was a high prevalence of multiple metastases associated with pathological fractures at the time of surgery. Mortality was high and early. Subtrochanteric location, the presence of fractures, anemia, and alterations in renal function were associated with higher mortality. The fixation method (synthesis or prosthesis / endoprosthesis), the number of bone metastases, and the presence of metastasis in other organs did not affect mortality.Breast cancer with metastasis to the femur is an advanced disease with early mortality. Clinical and orthopedic factors should be considered as soon as possible when lesions occur, regardless of the type of implant used / Mestrado / Fisiopatologia Cirúrgica / Mestre em Ciências
26

Carcinomas mucinosos no ovário : caracterização macroscópica, histológica e imunoistoquímica para o diferencial entre tumores primários e metastáticos / Mucinous carcinomas in the ovary : macroscopic, histologic and immunohistochemical characterization for the differential diagnosis of primary or metastatic tumors

Pinto, Paola Bertolotti Cardoso, 1976- 12 February 2013 (has links)
Orientadores: Liliana Aparecida Lucci De Angelo Andrade, Sophie Francoise Mauricette Derchain / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-24T12:06:20Z (GMT). No. of bitstreams: 1 Pinto_PaolaBertolottiCardoso_D.pdf: 22982855 bytes, checksum: ca4a4e679f0037c1494bf2866a333968 (MD5) Previous issue date: 2013 / Resumo: Os carcinomas mucinosos do ovário são raros e representam apenas 3% dos carcinomas. Frente a este diagnóstico, é preciso descartar a possibilidade de metástase para o ovário, principalmente de neoplasia primária do trato gastrointestinal. Apesar da avaliação morfológica, macro e microscópica, e das reações imunoistoquímicas contribuírem para o diagnóstico diferencial, existem casos de difícil diferenciação. Um algoritmo para separar os carcinomas mucinosos primários dos metastáticos no ovário foi proposto na literatura e determina que são metastáticos os tumores bilaterais ou unilaterais menores que 13cm, classificando as neoplasias com uma acurácia de quase 90%. Objetivos: comparar os aspectos macro e microscópicos aliados à avaliação imunoistoquímica para a diferenciação entre tumores mucinosos primários e metastáticos no ovário, avaliando a acurácia do algoritmo nos casos, os dados clínicos e sua evolução. Métodos: Todos os tumores mucinosos envolvendo o ovário, dos arquivos do Laboratório de Anatomia Patológica da UNICAMP no período de 1994 a 2009 foram levantados. Feita revisão dos prontuários com descrição dos dados clínicos, evolução das pacientes, revisão de lâminas para avaliação de dados histopatológicos e seleção dos blocos de parafina para a construção de micro-arranjo de tecidos, onde foram realizadas as reações imunoistoquímicas para: CK7, CK20, ?-catenina, WT-1, CDX-2, Dpc-4, CA125, RE e RP. Resultados: Dos 76 casos selecionados, 35 eram carcinomas mucinosos primários do ovário, 33 eram metastáticos e em 8 casos o primário não foi definido, sendo excluídos da análise estatística. A sobrevida média foi maior nos primários (65X35 meses; p<0.0001). A acurácia do algoritmo foi de 82,1%. A maioria dos metastáticos originou-se do cólon ou reto (54%). Dos primários, 85% eram unilaterais >13 cm e dos metastáticos, 61% eram bilaterais e 18% unilaterais <13cm. Entre as características histológicas, êmbolos carcinomatosos e a ausência de gradiente morfológico foram mais observados nos metastáticos. Na análise bivariada dos marcadores apenas CK7, CK20 e CDX2 mostraram diferenças significantes entre os grupos, entretanto houve muita sobreposição de resultados. Após análise multivariada foram selecionados: gradiente histológico e CK7 para formação de um novo algoritmo que definiu, com acurácia de 91%, que um tumor é metastático quando apresenta qualquer um dos aspectos: bilateral; unilateral e <13 cm; ausência de gradiente histológico; ou gradiente histológico presente com falta de expressão do CK7. Conclusão: tanto o algoritmo, como as reações imunoistoquímicas e os aspectos morfológicos são úteis no diagnóstico diferencial entre primário e metastático, porém não há nenhum dado discriminatório e, em alguns casos, somente a análise com equipe multidisciplinar pode definir o primário, reconhecendo as peculiaridades deste diagnóstico desafiador / Abstract: Primary ovarian mucinous carcinomas are uncommon and the most important differential is metastatic adenocarcinoma, mainly from gastrointestinal origin. Besides immunohistochemical profile, an algorithm determines, with a high accuracy, that unilateral and >13cm tumors are primary carcinomas and all the others, metastasis. Objective: to describe clinical and histopathological aspects of mucinous carcinomas, assessing the algorithm accuracy and immunohistochemical markers contributory to diagnosis. Methods: 76 mucinous carcinomas from our files (1994-2009) were revised; immunohistochemical reactions for CK7, CK20, Ca125, hormonal receptors (ER, PR), WT1, SMAD4, ?-catenin, CDX2 were performed by TMA. Results: 35 were ovarian primary tumors (group 1), 33 were metastasis (group 2). In eight cases the primary was not identified and these were excluded from statistic analysis. Most of the metastasis were from colorectal cancer (54%). Mean survival differed between the groups (65X35 months; p<0.0001). Agreement with the algorithm was 82.1%. In group 1, 85% were unilateral >13cm; in group 2, 61% were bilateral and 18% unilateral tumors <13cm. Different from group 1, common features in group 2 were vascular invasion and tumors without histological gradient. Bivariate analysis pointed out CK7, CK20 and CDX2 as main markers to distinguish both groups, but overlapping of the results was observed. After multivariate analysis, 2 aspects were selected: histological gradient and CK7; a new algorithm was designed and established with an accuracy of 91%, that a mucinous carcinoma is metastatic to the ovary when it shows one of the aspects: bilateral, or unilateral and <13cm, or without histological gradient, or presence of histological gradient but CK7 is negative. Conclusion: Algorithm and immunohistochemistry are useful, but there is no gold-standard marker. In some cases, only multidisciplinary evaluation can achieve reliable anatomo-clinical diagnosis, in this challenging situation / Doutorado / Anatomia Patologica / Doutora em Ciências Médicas
27

Fatores de prognóstico do mixofibrossarcoma apendicular / Prognostic factors of appendicular myxofibrosarcoma

Juan Pablo Zumarraga Montaño 03 May 2018 (has links)
INTRODUÇÃO: O mixofibrossarcoma (MFS) é um dos mais frequentes sarcomas de partes moles (SPM) em idosos que afeta principalmente as extremidades. Historicamente, é um grupo de tumores heterogêneos. Clinicamente está caracterizado por apresentar uma alta incidência de recorrência local (RL) e um conhecimento limitado sobre a sua capacidade de metástase. O índice de RL após a ressecção cirúrgica é relativamente maior quando comparado com outros SPM. Não existe um consenso em como identificar os pacientes com maior risco. O objetivo deste estudo foi analisar os fatores de prognóstico dos pacientes diagnosticados com MFS em uma instituição única. MÉTODOS: Foram analisados retrospectivamente os prontuários de 75 pacientes com diagnóstico confirmado de MFS nas extremidades, que foram submetidos a tratamento cirúrgico, nos últimos 25 anos. Comparamos idade, sexo, tamanho e localização do tumor, grau histológico segundo a Fédération Nationale des Centres de Lutte Contre le Cancer (FNCLCC) e o estádio segundo a American Joint Committee on Cancer (AJCC). A média de idade foi 49,7 anos. A localização foi: membro superior (25,4%), membro inferior (66,6%) e pelve (8%). Os pacientes apresentaram baixo, intermediário e alto grau, em: 29,3%, 24% e 46,7% dos tumores, respectivamente. Pelo tamanho foram categorizados em: =/< 5 cm (13,3%), > 5 e <10 cm (42,7%), > 10 e <15 cm (9%) e =/> 15 cm (18,7%). Em total, 26,7% receberam radioterapia pós-operatória. As margens foram livres em 76% e comprometidas em 24%. A análise da regressão de Cox bivariada foi utilizada para determinar as associações entre os fatores clínicos e de tratamento com a RL. RESULTADOS: O tempo médio de seguimento foi 30.7 meses. O 26,7% dos pacientes apresentaram RL. Metástase foi reportada em 27 (36%) pacientes. O local mais comum de metástase foi: pulmão (92,6%) e gânglios linfáticos (18,5%). O tempo médio de sobrevida dos pacientes com metástase foi 21,2 meses. Os fatores preditivos para RL foram: margens comprometidas (hazard ratio 5.47, 95% intervalo de confiança, 2.23-13.40, P < 0.001) e metástase (hazard ratio 10.24, 95% intervalo de confiança, 3.53-26.68, P < 0.001). Os fatores preditivos da sobrevida livre de RL foram: grau histológico, margens comprometidas (hazard ratio 3.18, 95% intervalo de confiança, 1.51-6.70, P =0.001), e metástase (hazard ratio 15.23, 95% intervalo de confiança, 5.57-41.61, P= 0.001). Os fatores preditivos de sobrevida em geral foram: RL (hazard ratio 5.13, 95% intervalo de confiança, 2.15-12.24, P < 0.001), e metástase (hazard ratio 540.97, 95% intervalo de confiança, 5.04-58112.03, P < 0.001). CONCLUSÃO: As margens cirúrgicas comprometidas e a metástase estão diretamente associadas com a RL. O grau histológico do tumor, as margens comprometidas, a RL e a metástase, são fatores de pior prognóstico no MFS / BACKGROUND AND AIMS: Myxofibrosarcoma (MFS) is one of the most common soft tissue sarcomas (STS) in elderly patients and it primarily affects the extremities. They are a historically heterogeneous group of tumors. The clinical course of MFS is characterized by a high incidence of local recurrences (LR), but knowledge about distant metastasis is sparse. MFS is reported to have a higher risk of LR following definitive surgical excision relative to other STS. There is no agreement on how to identify patients at major risk. The objectives of this study were to analyze the prognostic factors and outcomes of patients with MFS treated at a single institution. METHODS: We retrospectively reviewed the records of 75 patients with pathologically confirmed MFS of the extremities who underwent surgery in the last 25 years. We compared the age, sex, tumor size and location, Fédération Nationale des Centres de Lutte Contre le Cancer (FNCLCC) grade and the American Joint Committee on Cancer (AJCC) stage. Median age was 49.7 years (range, 1 to 88 y). Site of disease was: upper extremity (25.4%), lower extremity (66.6%) and pelvic (8%). Patients had low, intermediate and high-grade, in: 29.3%, 24% and 46.7% of tumors, respectively. Tumors were categorized as =/< 5 cm (13.3%), > 5 and < 10 cm (42.7%), > 10 and < 15 cm (9%) and =/> 15 cm (18.7%). In total, 26.7% received postoperative radiotherapy. All patients underwent surgery. Margins were negative in 76% and positive in 24%. Bivariate Cox regression analysis was utilized to determine associations between clinical and treatment factors with LR. RESULTS: Median follow-up time was 30.7 months (range, 1.8 to 383.8 m). We found a 26.7% of LR. Distant metastasis was reported in 27 (36%) patients. The most common sites of metastasis were: lung (92.6%) and lymph nodes (18.5%). The overall survival rate in patients with metastasis was 21.2 months (range, 4.8 to 114.8 m). Predictors of LR were: positive margins (hazard ratio 5.47, 95% confidence interval, 2.23-13.40, P < 0.001) and distant metastasis (hazard ratio 10.24, 95% confidence interval, 3.53-26.68, P < 0.001). Predictors of overall survival free of LR were: grade, positive margins (hazard ratio 3.18, 95% confidence interval, 1.51-6.70, P =0.001), and distant metastasis (hazard ratio 15.23, 95% confidence interval, 5.57-41.61, P= 0.001). Predictors of overall survival were grade, LR (hazard ratio 5.13, 95% confidence interval, 2.15-12.24, P < 0.001), and distant metastasis (hazard ratio 540.97, 95% confidence interval, 5.04-58112.03, P < 0.001). CONCLUSION: In this institutional series of MFS, positive margins and distant metastasis were significantly associated with a higher risk of LR. Tumor grade, LR, positive margins and distant metastases were significant predictors of overall survival poor prognosis
28

Komplexní předoperační zobrazování nádorů mozku / Complex Preoperative Brain Tumor Imaging

Tupý, Radek January 2018 (has links)
Title Complex preoperative brain tumor imaging Abstract The differentiation of glioblastoma, metastases and brain lymphoma using modern diagnostic imaging methods has a major impact on the strategy of further diagnostic examinations and treatment. In a group of 67 patients with glioblastoma and 31 with cerebral metastasis, the ability to differentiate them according to the evaluation of perfusion parameters changes in peritumoral white matter by T1 dynamic post-contrast magnetic resonance imaging was verified, with the positive predictive value in glioblastoma detection up to 91%. In a group of 36 brain lymphoma patients the importance of imaging submodalities and contribution of a complex magnetic resonance imaging protocol to detect lymphoma up to 80% were evaluated. Key words brain, glioblastoma, lymphoma, magnetic resonance imaging, neoplasm metastasis
29

The role of Ras and Kinase Suppressor of Ras 1 (KSR-1) in breast cancer in progression and metastasis /

De Cristofano, Sabrina. January 2007 (has links)
No description available.
30

Komplexní předoperační zobrazování nádorů mozku / Complex Preoperative Brain Tumor Imaging

Tupý, Radek January 2018 (has links)
Title Complex preoperative brain tumor imaging Abstract The differentiation of glioblastoma, metastases and brain lymphoma using modern diagnostic imaging methods has a major impact on the strategy of further diagnostic examinations and treatment. In a group of 67 patients with glioblastoma and 31 with cerebral metastasis, the ability to differentiate them according to the evaluation of perfusion parameters changes in peritumoral white matter by T1 dynamic post-contrast magnetic resonance imaging was verified, with the positive predictive value in glioblastoma detection up to 91%. In a group of 36 brain lymphoma patients the importance of imaging submodalities and contribution of a complex magnetic resonance imaging protocol to detect lymphoma up to 80% were evaluated. Key words brain, glioblastoma, lymphoma, magnetic resonance imaging, neoplasm metastasis

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