Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 26
Filtrar
1.
Am J Surg ; 226(6): 868-872, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-37507253

RESUMO

BACKGROUND: The COVID-19 pandemic decreased the operative case volume for surgical residents. Our institution implemented Entrustable Professional Activities (EPAs) in all core surgical training programs to document the competency of graduating residents. Continuation of this project aimed to improve implementation. METHODS: This project occurred at a large academic center with eight surgical specialties during the 2020-21 (Year 1) and 2021-22 (Year 2) academic years. Each specialty chose five EPAs, and residents were asked to obtain three micro-assessments per EPA. After the initial pilot year, program directors were surveyed regarding perceptions of EPA utility and barriers to implementation. RESULTS: Seventy senior residents completed 732/906 (80.8%) micro-assessments. Of these, 99.6% were deemed practice ready. Total micro-assessment completion rates in four specialties, four specific EPAs (including one EPA identified "at risk" due to the COVID-19 pandemic), and overall were significantly higher in Year 2 than Year 1 (p â€‹< â€‹0.05) CONCLUSIONS: Implementing EPAs in all core surgical specialties at an institution is achievable, though expectedly initially imperfect. An ongoing quality collaborative initiative focused on barriers to implementation can improve completion rates.


Assuntos
COVID-19 , Internato e Residência , Humanos , Pandemias , Melhoria de Qualidade , Educação Baseada em Competências , Competência Clínica , COVID-19/epidemiologia
2.
Acad Med ; 97(12): 1780-1785, 2022 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-36449918

RESUMO

PROBLEM: Residents may experience mistreatment by faculty, peers, nurses, or patients. While faculty are reportedly the primary contributors to mistreatment, residents can also be offenders, which merits study. Forum theatre (FT) is an experiential learning modality requiring a peer group to develop problem-solving strategies. FT was piloted to address mistreatment among residents. The objective was to determine whether FT was feasible, acceptable to resident learners, and could lead to self-reported changes in perceptions or behaviors, providing program directors a focused option to address professionalism as a competency. APPROACH: This initiative was conducted from September 2019 through February 2021 in obstetrics-gynecology and urology residencies at UT Health San Antonio and consisted of 3 phases: a focus group to identify mistreatment experienced by residents, resident volunteers to create and act out the FT scenario, and enactment of the FT scenario during didactic time. Residents completed anonymous retrospective pre- and postsurveys, as well as at 6-8 months after, to assess knowledge, attitudes, and self-reported and observed behaviors. Wilcoxon rank-sum tests and 2-sample t tests for proportions were used to compare variables between groups. OUTCOMES: The FT was completed successfully in both departments during didactic time. Twenty-six residents participated, 24 (92%) responded. Most respondents (23, 96%) would recommend FT to colleagues for teaching professionalism. Behavior changes were reported by 15 (63%) participants after the program. After 6-8 months, self-reported mistreatment behaviors had decreased, including "making fun of others" (15 (63%) to 10 (38%), P = .04) and sending "disparaging texts" (13 (54%) to 7 (27%), P =.02). NEXT STEPS: The use of FT during regularly scheduled didactic times was feasible and well received among residents. The evaluation demonstrated sustained self-reported behavior changes. Plans are ongoing to expand this approach to other medical specialties and professions institutionally.


Assuntos
Docentes , Grupo Associado , Feminino , Gravidez , Humanos , Projetos Piloto , Estudos Retrospectivos , Autorrelato
3.
Indian J Urol ; 36(4): 270-275, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33376262

RESUMO

INTRODUCTION: Urology residents are encouraged to learn ultrasound (U/S) imaging, yet there are few tools available for teaching and assessing a resident`s competence. The aim of this study was to test the new SonoSim LiveScan® and to propose a competency-based assessment model for the urology graduate medical education. MATERIALS AND METHODS: Urology residents attended an interactive training session covering the urological U/S techniques guided by the assessment model developed by the authors. Faculty members evaluated the residents using defined objectives, and the residents were surveyed on their comfort level for performing each of the model tasks. A subset of the residents then underwent a structured testing using the SonoSim LiveScan device 6 months following the training. The model developed assessed: general U/S setup, structure identification, and pathologic clinical scenarios. RESULTS: The residents felt most comfortable in identifying the bladder (4.73/5) and the kidneys (4.53/5) during the training sessions. They felt least comfortable while testing for total ureteric obstruction (3.13/5). All the residents were confident that additional U/S training sessions would improve their comfort level in performing the assessed objectives. Resident`s assessment performed at 6 months had a median test score of 15.5/20 and the assessment scores increased with resident seniority. Self-reported comfort, however, did not seem to correlate with seniority. In general, the residents felt that the SonoSim device was highly functional (4.4/5) and the pathologic assessments in particular were very helpful (4.4/5). CONCLUSIONS: Through pilot testing, we propose that a competency-based assessment used with the SonoSim LiveScan could guide the resident`s education through the acquisition of U/S skills and warrants testing in a larger cohort.

4.
Cancer Lett ; 433: 232-241, 2018 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-30003927

RESUMO

Radiation therapy (XRT) is a standard treatment for prostate cancer (PCa). Although dose escalation increases local control, toxicity hampers further escalation. Broader improvement will be possible by the addition of adjuvant therapies, which can synergize with radiation and thus improve efficacy. We have identified a natural compound (Nexrutine, Nx) that inhibits the survival and growth of PCa cells in combination with radiation. Combination studies demonstrated strong interaction between Nx and radiation both in vitro in multiple PCa cell lines and in the Transgenic adenocarcinoma of mouse prostate (TRAMP) model. Nx potentiated growth inhibitory effects of IR by down regulating ribosomal protein S6K (RPS6KB1), CyclinD1, Chk1 and HIF-1 α and prolonging G2/M checkpoint block. RPS6KB1 is upregulated in prostate cancers and its expression is correlated with tumor grade. Knockdown of RPS6KB1 in PCa cells increased their sensitivity toward radiation-induced survival inhibition. Overall, we provide scientific evidence (i) in support of Nx as an adjuvant in PCa patients receiving XRT (ii) suggesting that RPS6KB1 is an important player in Nx-mediated combinatorial benefits and emphasizes that RPS6KB1 is a novel target for PCa treatment. These data underscore the need to test the agent in additional preclinical models to validate these observations.


Assuntos
Antineoplásicos/farmacologia , Extratos Vegetais/farmacologia , Neoplasias da Próstata/radioterapia , Proteínas Quinases S6 Ribossômicas 70-kDa/antagonistas & inibidores , Proteínas Quinases S6 Ribossômicas 70-kDa/genética , Animais , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/efeitos da radiação , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos da radiação , Quinase 1 do Ponto de Checagem/biossíntese , Ciclina D1/biossíntese , Pontos de Checagem da Fase G2 do Ciclo Celular/efeitos dos fármacos , Técnicas de Silenciamento de Genes , Humanos , Subunidade alfa do Fator 1 Induzível por Hipóxia/biossíntese , Masculino , Camundongos , Células PC-3 , Proteínas Quinases S6 Ribossômicas 70-kDa/biossíntese
5.
Am J Manag Care ; 24(1 Suppl): S4-S10, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29337486

RESUMO

BACKGROUND: Active surveillance (AS) has been widely implemented within Veterans Affairs' medical centers (VAMCs) as a standard of care for low-risk prostate cancer (PCa). Patient characteristics such as age, race, and Agent Orange (AO) exposure may influence advisability of AS in veterans. The 17-gene assay may improve risk stratification and management selection. OBJECTIVES: To compare management strategies for PCa at 6 VAMCs before and after introduction of the Oncotype DX Genomic Prostate Score (GPS) assay. STUDY DESIGN: We reviewed records of patients diagnosed with PCa between 2013 and 2014 to identify management patterns in an untested cohort. From 2015 to 2016, these patients received GPS testing in a prospective study. Charts from 6 months post biopsy were reviewed for both cohorts to compare management received in the untested and tested cohorts. SUBJECTS: Men who just received their diagnosis and have National Comprehensive Cancer Network (NCCN) very low-, low-, and select cases of intermediate-risk PCa. RESULTS: Patient characteristics were generally similar in the untested and tested cohorts. AS utilization was 12% higher in the tested cohort compared with the untested cohort. In men younger than 60 years, utilization of AS in tested men was 33% higher than in untested men. AS in tested men was higher across all NCCN risk groups and races, particular in low-risk men (72% vs 90% for untested vs tested, respectively). Tested veterans exposed to AO received less AS than untested veterans. Tested nonexposed veterans received 19% more AS than untested veterans. Median GPS results did not significantly differ as a factor of race or AO exposure. CONCLUSIONS: Men who receive GPS testing are more likely to utilize AS within the year post diagnosis, regardless of age, race, and NCCN risk group. Median GPS was similar across racial groups and AO exposure groups, suggesting similar biology across these groups. The GPS assay may be a useful tool to refine risk assessment of PCa and increase rates of AS among clinically and biologically low-risk patients, which is in line with guideline-based care.


Assuntos
Testes Genéticos/métodos , Neoplasias da Próstata/diagnóstico , Medição de Risco/métodos , Conduta Expectante/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Biópsia , Marcadores Genéticos , Predisposição Genética para Doença/genética , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Neoplasias da Próstata/genética , Neoplasias da Próstata/patologia , Neoplasias da Próstata/terapia , Estudos Retrospectivos , Fatores de Risco , Estados Unidos , United States Department of Veterans Affairs , Veteranos/estatística & dados numéricos , Conduta Expectante/estatística & dados numéricos
6.
EBioMedicine ; 7: 85-93, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-27322462

RESUMO

BACKGROUND: In the Prostate Cancer Prevention Trial, finasteride selectively suppressed low-grade prostate cancer and significantly reduced the incidence of prostate cancer in men treated with finasteride compared with placebo. However, an apparent increase in high-grade disease was also observed among men randomized to finasteride. We aimed to determine why and hypothesized that there is a grade-dependent response to finasteride. METHODS: From 2007 to 2012, we randomized dynamically by intranet-accessible software 183 men with localized prostate cancer to receive 5mg finasteride or placebo daily in a double-blind study during the 4-6weeks preceding prostatectomy. As the primary end point, the expression of a predefined molecular signature (ERß, UBE2C, SRD5A2, and VEGF) differentiating high- and low-grade tumors in Gleason grade (GG) 3 areas of finasteride-exposed tumors from those in GG3 areas of placebo-exposed tumors, adjusted for Gleason score (GS) at prostatectomy, was compared. We also determined androgen receptor (AR) levels, Ki-67, and cleaved caspase 3 to evaluate the effects of finasteride on the expression of its downstream target, cell proliferation, and apoptosis, respectively. The expression of these markers was also compared across grades between and within treatment groups. Logistic regression was used to assess the expression of markers. FINDINGS: We found that the predetermined molecular signature did not distinguish GG3 from GG4 areas in the placebo group. However, AR expression was significantly lower in the GG4 areas of the finasteride group than in those of the placebo group. Within the finasteride group, AR expression was also lower in GG4 than in GG3 areas, but not significantly. Expression of cleaved caspase 3 was significantly increased in both GG3 and GG4 areas in the finasteride group compared to the placebo group, although it was lower in GG4 than in GG3 areas in both groups. INTERPRETATION: We showed that finasteride's effect on apoptosis and AR expression is tumor grade dependent after short-term intervention. This may explain finasteride's selective suppression of low-grade tumors observed in the PCPT.


Assuntos
Finasterida/administração & dosagem , Neoplasias da Próstata/tratamento farmacológico , Neoplasias da Próstata/patologia , Receptores Androgênicos/metabolismo , Administração Oral , Idoso , Apoptose , Biomarcadores Tumorais/metabolismo , Proliferação de Células/efeitos dos fármacos , Método Duplo-Cego , Finasterida/farmacologia , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Neoplasias da Próstata/metabolismo , Resultado do Tratamento
7.
BJU Int ; 111(7): 1054-60, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23171223

RESUMO

UNLABELLED: WHAT'S KNOWN ON THE SUBJECT? AND WHAT DOES THE STUDY ADD?: No cost-effectiveness studies exist in patients after radical cystectomy for the routine use of alvimopan for the prevention of postoperative ileus. The present study provides a reasonable estimate of the cost-effectiveness of alvimopan for the prevention of postoperative ileus in the patient after radical cystectomy. OBJECTIVE: To determine if the cost of administering alvimopan, to help restore bowel function after abdominal surgery, to all patients undergoing radical cystectomy (RC) is cost prohibitive. PATIENTS AND METHODS: A cost-effective analysis was conducted from a healthcare payer perspective using a decision-tree model that incorporated direct healthcare costs and probabilities associated with the possible events and outcomes. Sensitivity analyses were conducted on the influence of the cost and effectiveness of the drug, the probability of POI in RC patients, and the extended length of stay (LOS) as a result of POI. Precision in estimates was determined using probabilistic sensitivity analyses with 5000 Monte-Carlo simulations. RESULTS: Under the base case assumption, the additional cost of a patient's LOS related to POI was $10 246 per person. Under the assumption that 15.6% of patients will have POI, the mean cost associated with POI in a cohort of patients not treated with alvimopan was $1597 (90% confidence interval [CI] $1335-1875) per patient. Conversely, the routine use of alvimopan for all patients undergoing RC was associated with a mean POI-associated cost of $1495(90% CI $1312-1696) per person, which represents the cost of alvimopan ($700 per hospitalisation) and a 50% reduction in the rate of POI. Sensitivity analyses revealed that there is a cost savings with the routine use of alvimopan under the following conditions: the POI results in extending LOS by ≥3.5 days, POI occurs in ≥14% of patients undergoing RC, or the drug results in a relative risk reduction of ≥44%. CONCLUSIONS: Routine use of perioperative alvimopan may not be cost prohibitive because of its influence on POI rate and associated costs. The cost-effectiveness of alvimopan is influenced by the POI incidence and the degree to which the drug can decrease the LOS.


Assuntos
Cistectomia/efeitos adversos , Fármacos Gastrointestinais/economia , Fármacos Gastrointestinais/uso terapêutico , Pseudo-Obstrução Intestinal/prevenção & controle , Tempo de Internação/economia , Piperidinas/economia , Piperidinas/uso terapêutico , Análise Custo-Benefício , Feminino , Motilidade Gastrointestinal/efeitos dos fármacos , Humanos , Pseudo-Obstrução Intestinal/economia , Pseudo-Obstrução Intestinal/etiologia , Masculino , Período Pós-Operatório
8.
ISRN Oncol ; 2012: 596029, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22523708

RESUMO

Purpose. We performed a retrospective study to determine the outcome of a modern cohort of patients with high-grade (Gleason score ≥ 8) prostate cancer treated with radical prostatectomy, radiation therapy, or hormone therapy. Methods. We identified 404 patients in the South Texas Veteran's Healthcare System Tumor Registry diagnosed with high grade prostate cancer between 1998 and 2008. Mean follow-up was 4.62 ± 2.61 years. End points were biochemical failure-free survival, overall survival, metastasis-free survival, and cancer-specific survival. Results. 5-year overall survival for patients undergoing radical prostatectomy, radiation therapy, and hormone therapy was 88.9%, 76.3%, and 58.9%, respectively. 5-year metastasis-free survival for patients undergoing radical prostatectomy, radiation therapy, and hormone therapy was 96.8%, 96.6%, and 88.4%, respectively, and 5-year cancer-specific survival was 97.2%, 100%, and 89.9%, respectively. Patients with a Gleason score of 10 and pretreatment prostate-specific antigen > 20 ng/mL had decreased 5-year biochemical failure-free and cancer-specific survival. Patients with a pretreatment prostate-specific antigen > 20 ng/mL had decreased 5-year overall survival. Discussion. Even for patients with high-grade disease, the outcome is not as dire in the modern era regardless of primary treatment modality chosen. While there is room for improvement, we should not have a nihilistic impression of how these patients will respond to treatment.

10.
Int J Surg Pathol ; 18(4): 298-9, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20444733

RESUMO

Intraductal carcinoma of the prostate (IDCP) involving prostatic ducts and acini is a well-known phenomenon typically seen in a background of high-grade invasive prostatic adenocarcinoma. The current case of prostatic adenocarcinoma with Gleason score of 9 (4 + 5) invades the ejaculatory ducts, left seminal vesicle, and extraprostatic tissue. The tumor involving the left ejaculatory duct spans the lumen with preservation of native duct architecture, including basal cells, similar features described in IDCP involving prostatic ducts and acini.


Assuntos
Carcinoma Ductal/patologia , Ductos Ejaculatórios/patologia , Neoplasias da Próstata/patologia , Idoso , Biomarcadores Tumorais/metabolismo , Carcinoma Ductal/metabolismo , Carcinoma Ductal/cirurgia , Humanos , Masculino , Neoplasias Primárias Múltiplas , Prognóstico , Prostatectomia , Neoplasia Prostática Intraepitelial/metabolismo , Neoplasia Prostática Intraepitelial/patologia , Neoplasia Prostática Intraepitelial/cirurgia , Neoplasias da Próstata/metabolismo , Neoplasias da Próstata/cirurgia
11.
J Cancer ; 2: 1-19, 2010 Dec 07.
Artigo em Inglês | MEDLINE | ID: mdl-21197260

RESUMO

Several randomized studies have been completed in prostate cancer that show a benefit to immediate postoperative treatment in patients undergoing prostatectomy. In one of the studies, there was even a survival advantage. In spite of those positive findings, there has been some reluctance to uniformly offer adjuvant treatment to patients. The perception is that the risk is not really high enough to warrant the risk of toxicity that comes with treatment. There are clearly factors that can help predict who is at the highest risk. Our purpose is to review those factors and identify patients that have a high enough risk justifying immediate treatment.

12.
Can J Urol ; 13(5): 3250-4, 2006 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-17076946

RESUMO

OBJECTIVES: We performed the first prospective, randomized, multi-center comparison of overall quality and patient tolerability of polyethylene glycol (PEG) and sodium phosphate (NaP) solution for mechanical bowel preparation prior to urinary diversion surgery. METHODS: Between 2001 and 2003, 36 patients at six institutions underwent major urological reconstructive surgery incorporating small intestine (35 radical cystectomy with urinary diversion and 1 bladder augmentation). Patients were prospectively randomized to receive either oral polyethylene glycol (group 1, n = 16) or sodium phosphate (group 2, n = 20) for mechanical bowel preparation prior to surgery, according to our multi-institutional IRB-approved protocol. All patients completed a questionnaire the morning of surgery to assess the tolerability and side effects of each agent. Quality of the bowel preparation was recorded based on intraoperative findings of the attending surgeon, who was blinded to the preparation method. RESULTS: Both bowel cleansing regimens were safe and well tolerated. Patient-reported ease of use and subjective incidence of side effects were statistically similar in the two groups, and a statistically non-significant trend to more bloating in the PEG group was also noted (p = 0.085). Surgeon-scored overall quality of preparation adequacy revealed no significant differences between oral sodium phosphate and polyethylene glycol solutions (p = 0.555). Postoperative complications were rare for each bowel preparation agent. CONCLUSIONS: Performance characteristics of oral sodium phosphate and polyethylene glycol bowel preparations appear to be similar. Each method is safe, efficacious, and well-tolerated when used prior to urinary diversion surgery. The cost for the NaP preparation was $1.40 versus $19.70 for the PEG bowel preparation. Sodium phosphate may have a slight advantage because of its convenience and economic advantage.


Assuntos
Catárticos/farmacologia , Fosfatos/farmacologia , Polietilenoglicóis/farmacologia , Cuidados Pré-Operatórios/métodos , Derivação Urinária , Humanos , Masculino , Avaliação de Resultados em Cuidados de Saúde , Satisfação do Paciente
14.
Clin Cancer Res ; 12(7 Pt 1): 2178-84, 2006 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-16609032

RESUMO

PURPOSE: Epidemiologic and clinical data suggest that selenium could prevent prostate cancer, but it has not been shown that supplemental selenium leads to an increased concentration of selenium in prostate tissue compared with adjacent tissue. EXPERIMENTAL DESIGN: We conducted a randomized, controlled, short-term trial of l-selenomethionine (SeMet) versus observation in men with organ-confined prostate cancer. The primary endpoint was the measurement of selenium concentration in prostate tissue and seminal vesicle (SV). We assessed baseline selenium levels in serum and in toenail specimens (reflecting long-term intake) and post-intervention selenium levels in serum, and in prostate and SV tissues using hydride generation atomic fluorescence spectroscopy. RESULTS: Sixty-six eligible patients were randomly assigned to the SeMet (n = 34) or observation (n = 32) arm; both arms had similar baseline patient characteristics. Baseline serum selenium was similar in the two groups (P = 0.64). Baseline toenail selenium levels were slightly higher in the SeMet group than in the control group (P = 0.07). After the intervention, the mean serum selenium level increased 15% in the SeMet arm and was higher than in the observation arm (P = 0.001). The selenium concentration in prostate tissue was 22% higher in the SeMet arm (n = 26) than in the observation arm (n = 25; 1.80 versus 1.47 ppm; P = 0.003, Wilcoxon rank sum test) and remained significantly higher after adjusting for chronic selenium intake (P = 0.021, ANCOVA). SV selenium concentration was similar in both groups (P = 0.384) and was lower than in prostate tissue. CONCLUSIONS: The present study is the first to show that selenium taken as oral supplementation accumulates preferentially in the human prostate gland as opposed to the SV. These findings support the hypothesis that oral selenium supplementation may contribute to the cancer preventive effects of selenium.


Assuntos
Adenocarcinoma/cirurgia , Próstata/metabolismo , Neoplasias da Próstata/cirurgia , Selênio/metabolismo , Selenometionina/farmacocinética , Administração Oral , Adulto , Idoso , Relação Dose-Resposta a Droga , Esquema de Medicação , Humanos , Masculino , Pessoa de Meia-Idade , Próstata/química , Próstata/cirurgia , Prostatectomia/métodos , Selênio/análise , Selenometionina/administração & dosagem , Glândulas Seminais/química , Glândulas Seminais/metabolismo , Sensibilidade e Especificidade , Espectrometria de Fluorescência/métodos , Fatores de Tempo , Distribuição Tecidual
15.
Curr Urol Rep ; 7(3): 181-5, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16630521

RESUMO

Prostate cancer is the most common malignancy in men and, as a result, there has been a nationwide emphasis on screening and detection. With the widespread use of the prostate-specific antigen (PSA), prostate cancer screening effectively detects localized prostate cancer. However, recent reports have identified a significant proportion of prostate cancer in men with low PSA levels. Many of these cancers are higher-grade malignancies. Consequently, PSA may function more effectively as a screening tool when applied over a continuum that is associated with degree of risk, rather than a binary measure. Other markers are currently being investigated. Ideally, a marker will identify the malignancy that is a clinical threat, thereby avoiding intervention for indolent disease. Prevention strategies may be employed for higher-risk patients, and these strategies eventually may be tailored to genetic or other risks.


Assuntos
Neoplasias da Próstata/diagnóstico , Marcadores Genéticos , Humanos , Masculino , Antígeno Prostático Específico/sangue , Neoplasias da Próstata/sangue , Neoplasias da Próstata/genética
16.
Curr Urol Rep ; 7(3): 186-92, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16630522

RESUMO

Most prostate biopsies do not show malignancy. The proper management of non-cancerous pathologic findings of the prostate is controversial. For this article, we reviewed the current literature for indications for repeat prostate biopsy after initial biopsies demonstrated non-cancerous prostatic tissue or benign prostatic hyperplasia. This review includes discussions of management of asymptomatic prostatitis and how it may affect prostate-specific antigen, and also the management of several potentially premalignant lesions such as atrophy, atypical small acinar proliferation, and high-grade prostatic intraepithelial neoplasia. There is a paucity of randomized trials in this area and, considering the high number of biopsies with non-malignant findings, we conclude that more investigation is warranted in this area.


Assuntos
Próstata/patologia , Doenças Prostáticas/patologia , Biópsia , Humanos , Masculino , Neoplasia Prostática Intraepitelial/patologia , Neoplasias da Próstata/patologia
17.
Urology ; 67(1): 152-5, 2006 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-16413352

RESUMO

OBJECTIVES: To determine the prevalence of osteopenia and osteoporosis by central (spine and hip) and peripheral (radius) bone mineral density (BMD) in men with prostate cancer undergoing androgen-deprivation therapy (ADT). Low BMD and fractures are prevalent in this group of men. Most published studies on ADT-related bone loss have documented the loss of BMD in the spine and hip as measured by dual x-ray absorptiometry. In one study, the loss of BMD was most pronounced at the radius. METHODS: In a chart review of patients receiving ADT, the spine and hip BMD results were recorded in 89 patients. Of these 89 patients, the BMD of the radius was also recorded in 53. RESULTS: In the 89 patients with BMD measurements of the spine and hip, 24 (26.9%) had osteoporosis of the hip or spine as defined by a T score of -2.5 or less, and 45 patients (50.6%) had osteopenia (T score -1.0 to -2.5). In the subset of 53 patients who also had the BMD of the radius measured, the results of the BMD of the radius changed the category of diagnosis in 18 patients (34%). The prevalence of osteoporosis increased from 25% to 53% when the results of the radius were included. CONCLUSIONS: Men with prostate cancer treated with ADT have a high prevalence of osteopenia and osteoporosis as determined by peripheral and central BMD measurements. The use of the peripheral BMD measurement appears to identify more patients with osteoporosis and suggests its use in the evaluation of osteoporosis in men receiving ADT.


Assuntos
Antagonistas de Androgênios/uso terapêutico , Densidade Óssea , Doenças Ósseas Metabólicas/epidemiologia , Doenças Ósseas Metabólicas/etiologia , Orquiectomia , Osteoporose/epidemiologia , Osteoporose/etiologia , Neoplasias da Próstata/complicações , Neoplasias da Próstata/tratamento farmacológico , Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência
18.
J Urol ; 174(2): 519-22, 2005 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16006884

RESUMO

PURPOSE: Studies suggest that vitamin E may decrease the risk of prostate cancer. The Prevention Research Veteran Affairs E-vitamin Nutrition Trial is a randomized, double-blind, placebo controlled study designed to assess the effects of vitamin E supplementation on biomarkers associated with prostate cancer risk in peripheral blood and prostate tissue. MATERIALS AND METHODS: A total of 44 patients with increased prostate specific antigen (PSA) and/or abnormal digital rectal examination on initial evaluation were randomized to receive 400 IU vitamin E (22) vs placebo (22). Serum vitamin E, PSA, dehydroepiandrosterone, testosterone and insulin-like growth factor-1 (IGF-1) were measured in the 2 groups at baseline and then at 3-month intervals. Results are reported in 28 patients (placebo in 14 and vitamin E in 14) who completed the treatment as specified by the protocol. RESULTS: Serum Vitamin E was significantly higher in patients on vitamin E supplementation. alpha-Tocopherol supplementation did not affect the levels of PSA, serum androgens (testosterone and dehydroepiandrosterone) or (IGF-1). CONCLUSIONS: Serum alpha-tocopherol is increased by oral supplementation of vitamin E. We found that alpha-tocopherol supplementation has no effect on serum androgens, IGF-1 or PSA. The lack of an effect of vitamin supplementation on PSA avoids any bias in the diagnosis of prostate cancer in vitamin E treated patients. Our results suggest that a decrease in prostate cancer risk with alpha-tocopherol is likely to occur through a mechanism that is nonhormonal and independent of IGF-1.


Assuntos
Neoplasias da Próstata/prevenção & controle , Vitamina E/uso terapêutico , Antioxidantes/metabolismo , Desidroepiandrosterona/sangue , Suplementos Nutricionais , Humanos , Fator de Crescimento Insulin-Like I/análise , Masculino , Projetos Piloto , Estudos Prospectivos , Antígeno Prostático Específico/sangue , Testosterona/sangue , alfa-Tocoferol/sangue
19.
Curr Urol Rep ; 6(3): 177-82, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15869721

RESUMO

Chemoprevention trials for several malignancies are completed, planned, or underway. Prostate cancer is one of the most common forms of cancer and understandably has received considerable recent attention as a potential target for chemoprevention. This article examines chemoprevention trials for prostate cancer, including the Prostate Cancer Prevention Trial, Selenium and Vitamin E Cancer Prevention Trial, and cyclooxygenase inhibitors in the prevention of prostate cancer.


Assuntos
Antineoplásicos/uso terapêutico , Quimioprevenção/tendências , Neoplasias da Próstata/prevenção & controle , Quimioprevenção/métodos , Protocolos Clínicos , Inibidores de Ciclo-Oxigenase/uso terapêutico , Humanos , Masculino , Neoplasias da Próstata/diagnóstico , Selênio/uso terapêutico , Vitamina E/uso terapêutico
20.
Curr Urol Rep ; 6(3): 183-9, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15869722

RESUMO

Data from well-designed, prospective clinical trials are lacking to support treatment of primary tumor in men diagnosed with metastatic prostate cancer. However, a growing body of evidence suggests that treatment of the primary tumor may enhance cancer control and survival in some men. This evidence is examined and recommendations are made for identifying patients with metastatic prostate cancer who may benefit from definitive treatment of the prostate tumor.


Assuntos
Metástase Neoplásica/terapia , Neoplasias da Próstata/patologia , Neoplasias da Próstata/terapia , Antagonistas de Androgênios/uso terapêutico , Quimioterapia Adjuvante/métodos , Progressão da Doença , Humanos , Masculino , Metástase Neoplásica/diagnóstico , Prognóstico , Prostatectomia , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...