Publications by authors named "Martin Taphoorn"

Glioblastoma is the most common type of malignant primary brain tumor and a major cause of morbidity and mortality. In 2021 the World Health Organization updated the classification of Central Nervous System (CNS) tumors to restrict glioblastomas to isocitrate dehydrogenase-wildtype (IDHwt) tumors, improving understanding of the prognosis and optimal therapy for these tumors. This revision also enables more homogeneous populations of patients to be enrolled into clinical trials, facilitating the evaluation of novel therapies.

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Background: Core Outcome Sets (COS) define the minimum outcomes that should be measured and reported in all clinical trials for a specific health condition or health area. The aim was to develop 2 COS for intracranial meningioma to be used in future clinical studies: COSMIC: Intervention for effectiveness trials and COSMIC: Observation for studies of incidental/untreated meningioma.

Methods: A study advisory group was formed with representation from international stakeholder groups: EORTC BTG, ICOM, EANO, SNO, RANO-PRO, BNOS, SBNS, BIMS, TBTC, International Brain Tumour Alliance, and Brainstrust.

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Purpose: Interpretation of changes on the individual level is often based on minimally important differences (MIDs) developed on the group level. We investigated the impact of applying different group-level MIDs (anchor-based and 10-point MIDs) to determine health-related quality of life (HRQoL) changes in glioma patients. We further explored directions and magnitudes of these changes and their relationship to response formats and types of scale.

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Background: Epilepsy is a common symptom in patients with brain metastases (BMs), and because of the rising incidence of BMs, adequate seizure management is warranted. We conducted a systematic review on seizure outcomes after antitumor treatment and antiseizure medication (ASM) in patients with BMs from solid tumors and epilepsy.

Methods: A literature search was performed in 6 databases up to February 2024.

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Purpose: The rate of missing data on patient-reported health-related quality of life (HRQOL) in brain tumor clinical trials is particularly high over time. One solution to this issue is the use of proxy (i.e.

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Background And Objectives: The aim of this study was to evaluate the long-term results of seizure recurrence after antiseizure medication (ASM) withdrawal vs continuation in patients with diffuse glioma, grades 2 and 3.

Methods: A prospective multicenter observational study was conducted, and patients were recruited from January 2014 until May 2016 from 3 neuro-oncology outpatient clinics in the Netherlands. The main inclusion criteria were as follows: history of ≥1 seizure, for which ASM was started; clinically and radiologically stable disease for ≥12 months; and seizure freedom for ≥12 months from the date of last antitumor treatment or seizure freedom for ≥24 months from the last seizure if seizures occurred after the last antitumor treatment.

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Background: Instruments to assess patient-reported outcomes (PRO) should generate high-quality evidence. Reliable PRO evidence is essential to policymakers, in conjunction with outcomes such as survival and radiological response, to understand the net clinical benefit of antitumor treatments. This study aimed to establish the content validity of 215 identified PRO measures used in patients with brain tumors.

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Background: A pooled data analysis by Quinten et al. (2009) found three European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) health-related quality of life (HRQoL) scales to be prognostic for survival: physical functioning, pain and appetite loss. This study aims to replicate these findings in an independent data set comprising a broader cancer population.

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The development of the first European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Group (QLG) health-related quality of life (HRQoL) questionnaires contributed to the systematic uptake of HRQoL as an endpoint in cancer clinical trials, and to the measurement of HRQoL for individual assessment in routine care. Following a modular approach, these patient-reported outcome (PRO) measures (PROMs) ensure that both generic and disease-specific issues are assessed, enabling comparison of PROs across groups and studies. The application of a comprehensive and continually refined methodology for developing and updating these PROMs has been crucial in supporting their psychometric and cross-cultural validity, and their continued implementation in clinical research.

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Background: Progression-free survival, but not overall survival, was prolonged with bevacizumab and lomustine compared to lomustine only in the randomized phase 3 European Organization for Research and Treatment of Cancer (EORTC) 26101 study.

Objective: To evaluate the impact of treatment on health-related quality of life (HRQoL) in progressive glioblastoma patients participating in the EORTC 26101 study.

Methods: Patients with progressive glioblastoma, after standard radio-chemotherapy, were 2:1 randomized to either BEV/LOM or LOM.

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Background: Early treatment effects in patients with glioblastoma are frequently discussed during multidisciplinary team meetings (MDTM), after which a decision regarding (dis)continuation of tumor-targeted treatment is made. This study examined whether a separate and systematic evaluation of perfusion MRI (pMRI) could impact such treatment decisions in the early stage.

Methods: This retrospective observational study evaluated the diagnostic accuracy for detecting early tumor progression of 4 different approaches including conventional MRI, pMRI with Arterial Spin Labeling (ASL), and/or Dynamic Susceptibility Contrast (DSC) MRI, and compared those to the MDTM evaluation in clinical practice.

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Gliomas are highly heterogeneous and often include a nonenhancing component that is hyperintense on T weighted MRI. This can often not be distinguished from secondary gliosis and surrounding edema. We hypothesized that the extent of these T hyperintense areas can more accurately be determined on high-quality 7 T MRI scans.

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Background: Neuro-oncology patients and caregivers should have equitable access to rehabilitation, supportive-, and palliative care. To investigate existing issues and potential solutions, we surveyed neuro-oncology professionals to explore current barriers and facilitators to screening patients' needs and referral to services.

Methods: Members of the European Association of Neuro-Oncology and the European Organisation for Research and Treatment of Cancer Brain Tumor Group (EORTC-BTG) were invited to complete a 39-item online questionnaire covering the availability of services, screening, and referral practice.

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Purpose Of Review: To provide up-to-date evidence on patient-reported outcomes (PROs) in neuro-oncology, with a focus on the core constructs of health-related quality of life (HRQoL) and the use of PROs in clinical trials and clinical practice.[Supplemental Digital Content: Video Abstract PROs in Neuro-Oncology.mov].

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Article Synopsis
  • * This study examined 66 patients and found that delayed arterial transit times (ATTs) led to significant artifacts in ASL-MRI, impacting its ability to accurately assess tumor perfusion and differentiate between progression types.
  • * Results indicated that ASL-MRI tended to show hyperperfusion in the presence of moderate ATT artifacts, while discrepancies in the prediction of tumor progression were noted when ATT artifacts were severe, suggesting a need for improved imaging techniques in these patients.
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Article Synopsis
  • A systematic review was conducted to analyze how outcomes of meningioma clinical trials are measured and reported, addressing the lack of agreement on these measures.
  • The study reviewed 30 published articles and 18 ongoing trials, resulting in 47 clinical trials and 659 reported outcomes, which were grouped into unique terms using a standardized classification system.
  • The findings highlight the need for a more consistent approach to outcome measurement, leading to plans for a consensus meeting to create a core outcome set to guide future trials.
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Article Synopsis
  • A systematic review was conducted to analyze how outcomes are measured in studies of patients with incidental intracranial meningioma, as inconsistent practices have hindered comparative research.
  • The review included 33 published articles, resulting in 268 reported outcomes, which were refined to 178 unique outcomes categorized into 53 standardized terms and classified into 9 outcome domains.
  • The goal is to create a Core Outcome Set through stakeholder consensus, improving the consistency of outcome measurements in future studies.
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This narrative review provides an overview of the current knowledge on health-related quality of life (HRQOL), a relevant clinical outcome in patients with epilepsy. It shows that the most important factor determining HRQOL in this patient group is seizure frequency. In particular, seizure-freedom is associated with better HRQOL scores.

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Background: The proportion of women among healthcare and biomedical research professionals in neuro-oncology is growing. With changes in cultural expectations and work-life balance considerations, more men aspire to nonfull-time jobs, yet, leadership positions remain dominated by men.

Methods: The European Association of Neuro-Oncology (EANO) disparity committee carried out a digital survey to explore gender balance and actions suitable to promote gender equality.

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Article Synopsis
  • * Through interviews with 46 AYAs, four key pillars for a positive healthcare experience were identified: trust, tailored communication, an empathetic attitude, and proactive care.
  • * The findings suggest that both age-specific issues and those related to the cancer prognosis must be addressed in clinical practice to improve care, indicating a need for better training and resources for healthcare professionals while empowering AYAs in managing their health.
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Background And Objective: Leptomeningeal disease (LMD) is associated with poor survival and health-related quality of life (HRQoL). There is an urgent need for clinical research in this area to improve the outcomes. The purpose of this study is to summarize the areas of active clinical research in LMD, identify the knowledge gap, and suggest future research directions.

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  • Glioblastoma patients have a high risk of developing venous thromboembolism (VTE), and researchers aim to understand the genetic and signaling factors that contribute to this risk.
  • Using RNA sequencing, researchers compared gene expression profiles of glioblastoma patients with VTE to those without and identified 1246 differentially expressed genes, including GLI1, which is linked to the Sonic Hedgehog signaling pathway.
  • The findings suggest that the Sonic Hedgehog pathway may play a significant role in the risk of VTE among glioblastoma patients, particularly those with certain tumor subtypes.
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