Publications by authors named "Robert Bristow"

Objective: To evaluate the correlation in temporal trends in obesity and endometrioid endometrial cancer incidence in the United States using two comprehensive national databases.

Methods: This is a cohort study in which data on endometrioid endometrial cancer were obtained from the U.S.

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This article addresses the role of surgery in the management of gynecologic cancers with liver metastases. The authors review the short-term and long-term outcomes of aggressive resection through retrospective and randomized studies. Although the data supporting aggressive resection of liver metastasis are largely retrospective and case based, the randomized control data to address neoadjuvant versus chemotherapy have been widely criticized.

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Background: Current treatment strategies for primary epithelial ovarian cancer (EOC) have significantly evolved, and the value of complete cytoreduction has not yet been reassessed. The study aimed to investigate the impact of residual disease after cytoreductive surgery for EOC on survival outcomes within the recent paradigm of frontline ovarian cancer treatment.

Methods: We searched relevant literature from the MEDLINE, Embase, and Cochrane Library databases to identify randomized controlled trials and prospective clinical trials of primary EOC published between 1 January 2000 and 22 September 2022.

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Article Synopsis
  • The study examined the national rate of emergency cesarean sections (ECS) in pregnant trauma patients (PTPs) who were involved in motor vehicle collisions (MVCs) and found that 8% underwent ECS.
  • The median time from arrival to ECS was 115 minutes, with ECS patients showing higher rates of lung and spleen injuries, complications, and mortality compared to those who did not undergo ECS.
  • Key risk factors for requiring ECS included severe head or abdominal injuries and an elevated shock index (SI), indicating the severity of injury.
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Purpose: Men with high-risk prostate cancer (PCa) are treated with androgen deprivation therapy (ADT) and radiation therapy, but the disease reoccurs in 30% of patients. Biochemical recurrence of PCa after treatment is influenced by tumor hypoxia. Tumors with high levels of hypoxia are aggressive, resistant to treatment, and have increased metastatic capacity.

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To ensure timely duplication of the entire eukaryotic genome, thousands of replication machineries (replisomes) act on genomic DNA at any time during S phase. In the final stages of this process, replisomes are unloaded from chromatin. Unloading is driven by polyubiquitylation of MCM7, a subunit of the terminated replicative helicase, and processed by p97/VCP segregase.

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Endometrial cancer is one of few cancers that has continued to rise in incidence over the past decade with disproportionate increases in adults younger than 50 years old. We used data from the Surveillance, Epidemiology, and End Results Registry (2000-2019) to examine endometrial cancer incidence trends by race/ethnicity and age of onset among women in the United States. Case counts and proportions, age-adjusted incidence rates (per 100,000), and average annual percent changes were calculated by race/ethnicity, overall and stratified by age of onset (early vs late).

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This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To evaluate the benefits and harms of secondary CRS and chemotherapy in comparison to chemotherapy alone for women with platinum-sensitive recurrent epithelial ovarian cancer.

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Article Synopsis
  • Tumor hypoxia, which is when there isn't enough oxygen in parts of tumors, makes prostate cancer harder to treat and can lead to worse outcomes for patients.
  • A study tested a special drug called Pimonidazole (PIMO) in 39 prostate cancer patients to see how it can help in understanding tumor hypoxia and its effects on cancer.
  • The researchers discovered different patterns of PIMO staining in tumors, and one pattern was linked to more dangerous cancer traits, helping to create a new DNA signature that can identify patients at higher risk for serious disease.
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Motivation: Few methods exist for timing individual amplification events in regions of focal amplification. Current methods are also limited in the copy number states that they are able to time. Here we introduce AmplificationTimeR, a method for timing higher level copy number gains and inferring the most parsimonious order of events for regions that have undergone both single gains and whole genome duplication.

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Surgical decision making is complex and involves a combination of analytic, intuitive, and cognitive processes. Medicolegal, infrastructural, and financial factors may influence these processes depending on the context and setting, but to what extent can they influence surgical decision making in gynecologic oncology? This scoping review evaluates existing literature related to medicolegal, infrastructural, and financial aspects of gynecologic cancer surgery and their implications in surgical decision making. Our objective was to summarize the findings and limitations of published research, identify gaps in the literature, and make recommendations for future research to inform policy.

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The development of cancer is an evolutionary process involving the sequential acquisition of genetic alterations that disrupt normal biological processes, enabling tumor cells to rapidly proliferate and eventually invade and metastasize to other tissues. We investigated the genomic evolution of prostate cancer through the application of three separate classification methods, each designed to investigate a different aspect of tumor evolution. Integrating the results revealed the existence of two distinct types of prostate cancer that arise from divergent evolutionary trajectories, designated as the Canonical and Alternative evolutionary disease types.

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Objective: To quantify the impact on short-term ovarian cancer survival associated with treatment at high-performing hospitals using the observed-to-expected ratio (O/E) for adherence to ovarian cancer treatment guidelines as a risk-adjusted measure of hospital quality care.

Methods: This was a retrospective population-based study of stage I-IV invasive epithelial ovarian cancer reported to California Cancer Registry 1996-2017. A fit logistic regression model, risk-adjusted for patient and disease characteristics, was used to calculate O/E for each hospital stratified by hospital annual case volume.

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Purpose: To evaluate the relative effect of percent maximal cytoreductive surgery and other prognostic variables on survival among cohorts of patients with advanced-stage ovarian carcinoma treated with platinum-based chemotherapy.

Materials And Methods: Eighty-one cohorts of patients with stage III or IV ovarian carcinoma (6,885 patients) were identified from articles in MEDLINE (1989 through 1998). Linear regression models, with weighted correlation calculations, were used to assess the effects on log median survival time of the proportion of each cohort undergoing maximal cytoreduction, dose-intensity of the platinum compound administered, proportion of patients with stage IV disease, median age, and year of publication.

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Background: Primary vaginal cancer is rare and comprises 1-2% of female genital tract cancers. Among the types of vaginal cancer, adenocarcinoma accounts for only 10% with the peak incidence in women less than 20 years old. Clear cell type vaginal adenocarcinoma is most associated with exposure to diethylstilbestrol (DES) in-utero.

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Article Synopsis
  • Researchers wanted to compare two treatments for bladder cancer: one is surgery (radical cystectomy), and the other is a combination of surgery, chemotherapy, and radiation (trimodality therapy).
  • They studied 722 patients with similar cancer stages from different hospitals in the USA and Canada to see which treatment worked better.
  • The main goal was to see which treatment helped patients live longer without their cancer spreading, and they used complex methods (like matching patients) to ensure fair comparisons.
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Purpose: We analyzed adherence to the National Comprehensive Cancer Network treatment guidelines for anal squamous cell carcinoma in California and the associated impacts on survival.

Methods: This was a retrospective study of patients in the California Cancer Registry aged 18 to 79 years with recent diagnoses of anal squamous cell carcinoma. Predefined criteria were used to determine adherence.

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Background And Purpose: Tumour hypoxia is prognostic in head and neck cancer (HNC), associated with poor loco-regional control, poor survival and treatment resistance. The advent of hybrid MRI - radiotherapy linear accelerator or 'MR Linac' systems - could permit imaging for treatment adaptation based on hypoxic status. We sought to develop oxygen-enhanced MRI (OE-MRI) in HNC and translate the technique onto an MR Linac system.

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Prostate cancer is one of the most heritable cancers. Hundreds of germline polymorphisms have been linked to prostate cancer diagnosis and prognosis. Polygenic risk scores can predict genetic risk of a prostate cancer diagnosis.

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Predicting the survival outcomes of patients with colorectal cancer (CRC) remains challenging. We investigated the prognostic significance of the transcriptome and tumour-infiltrating lymphocyte T-cell receptor (TIL/Tc-TCR) repertoire and analysed TIL/Tc-TCR sequences of The Cancer Genome Atlas (TCGA) and the Clinical Proteomic Tumor Analysis Consortium (CPTAC) CRC cohorts. Using a multivariate Cox regression, we tested whether TIL/Tc-TCR repertoire, patient and tumour characteristics (stage, sidedness, total non-synonymous mutations, microsatellite instability (MSI) and transcriptional signatures) correlated with patient overall survival (OS) and designed a prognostic nomogram.

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Background: The value of hyperthermic intraperitoneal chemotherapy (HIPEC) at the time of cytoreductive surgery (CRS) for epithelial ovarian cancer (EOC) is controversial and its use remains experimental in most national and international guidelines. We wished to systematically evaluate all available evidence.

Methods: A comprehensive review of data from MEDLINE, EMBASE, and Cochrane Library databases was conducted from the first report on HIPEC in EOC till April 3, 2022.

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Background: Research suggests that geographic location may affect ovarian cancer (OC) outcomes. Insurance status often remains an important predictor of outcomes. The Affordable Care Act was enacted in 2010 to expand access to affordable health insurance.

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