10 results on '"Witteveen, Petronella O."'
Search Results
2. Use of a Symptom Diary on Oncology Wards: Effect on Symptom Management and Recommendations for Implementation.
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IJzerman-Korevaar, Margriet, der de Graeff, Alexan, Heijckmann, Steffie, Zweers, Daniëlle, Vos, Bernard H., Hirdes, Marloes, Witteveen, Petronella O., and Teunissen, Saskia C. C. M.
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- 2021
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3. Validation of the G8 screening tool in older patients with cancer considered for surgical treatment.
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Bruijnen, Cheryl P., Heijmer, Anne, van Harten-Krouwel, Diny G., van den Bos, Frederiek, de Bree, Remco, Witteveen, Petronella O., and Emmelot-Vonk, Mariëlle H.
- Abstract
The Geriatric 8 (G8) has proven to be one of the most sensitive frailty-screening tools for older patients with cancer undergoing systemic treatment. In this study we validated whether the G8 is also suitable for identifying impairments in their comprehensive geriatric assessment (CGA) in older patients with cancer undergoing surgery. Thereby, we investigated the differences in postoperative outcomes between the fit and frail patients classified by the G8. Patients ≥70 years with a surgery indication because of a (suspected) malignant disease were prospectively enrolled. In all patients, a CGA was performed. The G8 results were assessed in parallel. The diagnostic value of the G8 was determined by comparing the result with the CGA as a reference test. Deficits in CGA was defined as ≥ two impairments of the CGA. Postoperative complications were retrospectively obtained from the medical record and compared between the fit and frail patients. In total, 143 patients were enrolled. The sensitivity, specificity, and negative predictive value of the G8 were 82% (95% CI 70–91), 63% (95% CI 52–73), and 85% (95% CI 75–91). In the patients with an impaired G8, a significantly prolonged hospital stay, higher rate of delirium, and higher 1-year mortality rate were seen. The G8 is a simple and useful screening tool for identifying deficits in CGA in older patients with cancer requiring surgery. Second, we concluded that patients with an impaired G8 are more at risk for a complicated recovery from surgery. [ABSTRACT FROM AUTHOR]
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- 2021
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4. Predictive value of each geriatric assessment domain for older patients with cancer: A systematic review.
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Bruijnen, Cheryl P., van Harten-Krouwel, Diny G., Koldenhof, José J., Emmelot-Vonk, Mariëlle H., and Witteveen, Petronella O.
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A geriatric assessment (GA) is increasingly used to help guide treatment decisions in older patients with cancer. However, there is no consensus regarding which domains should be included in the GA. In addition, the field of geriatric oncology moves very fast and as a result many new studies have been published since the last review in 2015. Therefore, the objective of this systematic review is to evaluate which domains of the GA could predict patient-related treatment outcomes of older patients with cancer and thereby should be included in a GA. A systematic literature search was performed for publications in English or Dutch between September 2006 and July 2017 addressing the association between individual domains of the GA and mortality, postoperative complications, or systemic treatment-related outcomes in older patients with cancer. Eight different domains were evaluated in 46 publications, namely functional status, nutritional status, cognition, mood, physical function, fatigue, social support, and falls. All eight domains were predictive for at least one of the investigated outcomes but the results were quite variable across studies. Physical function and nutritional status were the domains most often associated with mortality and systemic treatment-related outcomes, and the domain physical function was most often associated with postoperative complications. Overall, this review demonstrates that the GA should minimally consist of physical function and nutritional status, when the aim is to predict patients-related outcomes of older patients with cancer, although the results are quite heterogeneous. For the other domains, the findings are too inconsistent to draw conclusions about their overall predictive ability. [ABSTRACT FROM AUTHOR]
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- 2019
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5. Pan-cancer whole-genome analyses of metastatic solid tumours
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Priestley, Peter, Baber, Jonathan, Lolkema, Martijn P., Steeghs, Neeltje, de Bruijn, Ewart, Shale, Charles, Duyvesteyn, Korneel, Haidari, Susan, van Hoeck, Arne, Onstenk, Wendy, Roepman, Paul, Voda, Mircea, Bloemendal, Haiko J., Tjan-Heijnen, Vivianne C. G., van Herpen, Carla M. L., Labots, Mariette, Witteveen, Petronella O., Smit, Egbert F., Sleijfer, Stefan, Voest, Emile E., and Cuppen, Edwin
- Abstract
Metastatic cancer is a major cause of death and is associated with poor treatment efficacy. A better understanding of the characteristics of late-stage cancer is required to help adapt personalized treatments, reduce overtreatment and improve outcomes. Here we describe the largest, to our knowledge, pan-cancer study of metastatic solid tumour genomes, including whole-genome sequencing data for 2,520 pairs of tumour and normal tissue, analysed at median depths of 106× and 38×, respectively, and surveying more than 70 million somatic variants. The characteristic mutations of metastatic lesions varied widely, with mutations that reflect those of the primary tumour types, and with high rates of whole-genome duplication events (56%). Individual metastatic lesions were relatively homogeneous, with the vast majority (96%) of driver mutations being clonal and up to 80% of tumour-suppressor genes being inactivated bi-allelically by different mutational mechanisms. Although metastatic tumour genomes showed similar mutational landscape and driver genes to primary tumours, we find characteristics that could contribute to responsiveness to therapy or resistance in individual patients. We implement an approach for the review of clinically relevant associations and their potential for actionability. For 62% of patients, we identify genetic variants that may be used to stratify patients towards therapies that either have been approved or are in clinical trials. This demonstrates the importance of comprehensive genomic tumour profiling for precision medicine in cancer.
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- 2019
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6. Melanoma during pregnancy: a report of 60 pregnancies complicated by melanoma
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de Haan, Jorine, Lok, Christianne A., de Groot, Christianne J., Crijns, Marianne B., Van Calsteren, Kristel, Dahl Steffensen, Karina, Halaska, Michael J., Altintas, Sevilay, Boere, Ingrid A., Fruscio, Robert, Kolawa, Wojciech, Witteveen, Petronella O., and Amant, Frédéric
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The management of melanoma during pregnancy is challenging as maternal benefits and fetal risks need to be balanced. Here, we present an overview of the incidence, the demographic and clinical characteristics and the treatment modalities used. After analysis of obstetric, fetal and maternal outcome, recommendations for clinical practice are provided. From the ‘International Network on Cancer, Infertility and Pregnancy’ database, pregnant patients with melanoma were identified and analysed. Sixty pregnancies were eligible for analysis. Fifty percent of the patients presented with advanced melanoma during pregnancy (14 stage III and 16 stage IV), and 27% were diagnosed with recurrent melanoma. Surgery was the main therapeutic strategy during pregnancy. Only four patients with advanced melanoma were treated during pregnancy with systemic therapy (n=1) or radiotherapy (n=3). Premature delivery was observed in 18% of the ongoing pregnancies, all which were induced and 78% of which involved patients with advanced melanoma. Thirty-nine percent of the patients died within 5 years; all had been diagnosed with stage III or IV disease during pregnancy. Melanoma can present in a more advanced stage during pregnancy. New systemic therapies may be beneficial for patients with metastatic melanoma but may not be pregnancy compatible. In these patients, preterm induction of labour need to be discussed, despite the short-term and long-term negative effects on the child.
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- 2017
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7. Prognosis of Women With Primary Breast Cancer Diagnosed During Pregnancy: Results From an International Collaborative Study.
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Amant, Frédéric, von Minckwitz, Gunter, Han, Sileny N., Bontenbal, Marijke, Ring, Alistair E., Giermek, Jerzy, Wildiers, Hans, Fehm, Tanja, Linn, Sabine C., Schlehe, Bettina, Neven, Patrick, Westenend, Pieter J., Müller, Volkmar, Van Calsteren, Kristel, Rack, Brigitte, Nekljudova, Valentina, Harbeck, Nadia, Untch, Michael, Witteveen, Petronella O., and Schwedler, Kathrin
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- 2013
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8. Impact of hormonal biomarkers on response to hormonal therapy in advanced and recurrent endometrial cancer.
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van Weelden, Willem Jan, Lalisang, Roy I., Bulten, Johan, Lindemann, Kristina, van Beekhuizen, Heleen J., Trum, Hans, Boll, Dorry, Werner, Henrica M.J., van Lonkhuijzen, Luc R.C.W., Yigit, Refika, Forsse, David, Witteveen, Petronella O., Galaal, Khadra, van Ginkel, Alexandra, Bignotti, Eliana, Weinberger, Vit, Sweegers, Sanne, Kroep, Judith R., Cabrera, Silvia, and Snijders, Marc P.L.M.
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ENDOMETRIAL cancer ,ESTROGEN receptors ,HORMONE therapy ,PROGESTERONE receptors ,GYNECOLOGIC oncology ,RNA metabolism ,PROTEIN metabolism ,THERAPEUTIC use of progestational hormones ,THERAPEUTIC use of antineoplastic agents ,IMMUNOHISTOCHEMISTRY ,CELL receptors ,CANCER relapse ,ESTROGEN antagonists ,TREATMENT effectiveness ,ENDOMETRIAL tumors ,AROMATASE inhibitors ,GENES ,IMPACT of Event Scale ,TAMOXIFEN - Abstract
Background: Approximately 20% of women with endometrial cancer have advanced-stage disease or suffer from a recurrence. For these women, prognosis is poor, and palliative treatment options include hormonal therapy and chemotherapy. Lack of predictive biomarkers and suboptimal use of existing markers for response to hormonal therapy have resulted in overall limited efficacy.Objective: This study aimed to improve the efficacy of hormonal therapy by relating immunohistochemical expression of estrogen and progesterone receptors and estrogen receptor pathway activity scores to response to hormonal therapy.Study Design: Patients with advanced or recurrent endometrial cancer and available biopsies taken before the start of hormonal therapy were identified in 16 centers within the European Network for Individualized Treatment in Endometrial Cancer and the Dutch Gynecologic Oncology Group. Tumor tissue was analyzed for estrogen and progesterone receptor expressions and estrogen receptor pathway activity using a quantitative polymerase chain reaction-based messenger RNA model to measure the activity of estrogen receptor-related target genes in tumor RNA. The primary endpoint was response rate defined as complete and partial response using the Response Evaluation Criteria in Solid Tumors. The secondary endpoints were clinical benefit rate and progression-free survival.Results: Pretreatment biopsies with sufficient endometrial cancer tissue and complete response evaluation were available in 81 of 105 eligible cases. Here, 22 of 81 patients (27.2%) with a response had estrogen and progesterone receptor expressions of >50%, resulting in a response rate of 32.3% (95% confidence interval, 20.9-43.7) for an estrogen receptor expression of >50% and 50.0% (95% confidence interval, 35.2-64.8) for a progesterone receptor expression of >50%. Clinical benefit rate was 56.9% for an estrogen receptor expression of >50% (95% confidence interval, 44.9-68.9) and 75.0% (95% confidence interval, 62.2-87.8) for a progesterone receptor expression of >50%. The application of the estrogen receptor pathway test to cases with a progesterone receptor expression of >50% resulted in a response rate of 57.6% (95% confidence interval, 42.1-73.1). After 2 years of follow-up, 34.3% of cases (95% confidence interval, 20-48) with a progesterone receptor expression of >50% and 35.8% of cases (95% confidence interval, 20-52) with an estrogen receptor pathway activity score of >15 had not progressed.Conclusion: The prediction of response to hormonal treatment in endometrial cancer improves substantially with a 50% cutoff level for progesterone receptor immunohistochemical expression and by applying a sequential test algorithm using progesterone receptor immunohistochemical expression and estrogen receptor pathway activity scores. However, results need to be validated in the prospective Prediction of Response to Hormonal Therapy in Advanced and Recurrent Endometrial Cancer (PROMOTE) study. [ABSTRACT FROM AUTHOR]- Published
- 2021
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9. Liver surgery induces an immediate mobilization of progenitor cells in liver cancer patients: A potential role for G-CSF
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Langenberg, Marlies H.G., Nijkamp, Maarten W., Roodhart, Jeanine M.L., Snoeren, Nikol, Tang, Terence, Shaked, Yuval, Hillegersberg, Richard van, Witteveen, Petronella O., Vermaat, Joost S.P., Kranenburg, Onno, Kerbel, Robert S., Medema, Rene H., Borel Rinkes, Inne H.M., and Voest, Emile E.
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Background: In preclinical models recruitment of bone-marrow derived (endothelial) progenitor cells (BD(E)PCs) contributes to tumor growth and metastasis formation. Here we investigated whether these (E)PCs and mobilizing cytokines are released after partial hepatectomy or radiofrequency ablation (RFA) for liver tumors. In addition, we tested whether G-CSF could play a role in EPC mobilization in mice and in human volunteers.Methods: Before, during and after liver surgery plasma and mononuclear cells were collected from 12 patients undergoing partial hepatectomy or RFA. To explore the role of G-CSF C57Bl/6 mice and 20 human volunteers received G-CSF (0.3 or 3 μg). In all individuals, (E)PC numbers were determined by flow cytometry at predefined timepoints shortly after therapy. Plasma levels of G-CSF, VEGF and SDF-1α were measured by ELISA>Results: Patients undergoing partial hepatectomy or RFA showed a instantaneous release of EPCs following laparotomy and mobilization of the liver. Elevated EPC levels were maintained during the entire procedure, but dropped to near-baseline levels 4 hours after completion of the procedure. Plasma G-CSF levels showed a 5-10-fold increase after the procedure and low-dose G-CSF administration to mice or healthy volunteers was sufficient to induce an immediate release of EPCs. Surgery also caused an increase in the plasma levels of VEGF, but not SDF1.Conclusion: Compliant with previous published data concerning VDA and chemotherapy treatment,liver surgery induces an instantaneous release of EPCs, conceivably in response to elevated G-CSF levels. This suggests the value of exploring therapeutic avenues to prevent this process.
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- 2010
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10. Perinecrotic Hypoxia Contributes to Ischemia/Reperfusion-Accelerated Outgrowth of Colorectal Micrometastases
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van der Bilt, Jarmila D.W., Soeters, Marije E., Duyverman, Annique M.M.J., Nijkamp, Maarten W., Witteveen, Petronella O., van Diest, Paul J., Kranenburg, Onno, and Borel Rinkes, Inne H.M.
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Ischemia/reperfusion (I/R) is often inevitable during hepatic surgery and may stimulate the outgrowth of colorectal micrometastases. Postischemic microcirculatory disturbances contribute to I/R damage and may induce prolonged tissue hypoxia and consequent stabilization of hypoxia-inducible factor (HIF)-1α. The aim of this study was to evaluate the contribution of postischemic microcirculatory disturbances, hypoxia, and HIF-1α to I/R-accelerated tumor growth. Partial hepatic I/R attributable to temporary clamping of the left liver lobe induced microcirculatory failure for up to 5 days. This was accompanied by profound and prolonged perinecrotic tissue hypoxia, stabilization of HIF-1α, and massive perinecrotic outgrowth of pre-established micrometastases. Restoration of the microcirculation by treatment with Atrasentan and l-arginine minimized hypoxia and HIF-1α stabilization and reduced the accelerated outgrowth of micrometastases by 50%. Destabilization of HIF-1α by the HSP90 inhibitor 17-DMAG caused an increase in tissue necrosis but reduced I/R-stimulated tumor growth by more than 70%. In conclusion, prevention of postischemic microcirculatory disturbances and perinecrotic hypoxia reduces the accelerated outgrowth of colorectal liver metastases after I/R. This may, at least in part, be attributed to the prevention of HIF-1α stabilization. Prevention of tissue hypoxia or inhibition of HIF-1α may represent attractive approaches to limiting recurrent tumor growth after hepatic surgery.
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- 2007
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