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Dive into the research topics where Wideke Nijdam is active.

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Featured researches published by Wideke Nijdam.


Brachytherapy | 2002

Chemotherapy and high-dose-rate brachytherapy in the management of advanced cancers of the nasopharynx: clinical impact of high technology--is it worth the cost?

Peter C. Levendag; Wideke Nijdam; Michel van Agthoven; Carin A. Uyl-de Groot

PURPOSE The aim of this study was to calculate the costs of chemotherapy and high-dose-rate brachytherapy in advanced-stage nasopharyngeal cancer. It is argued whether the effect of chemotherapy and this type of high-dose, high-precision radiation therapy is worth the costs. METHODS AND MATERIALS Clinical results of Stage III-IVB nasopharyngeal cancer in patients treated between 1991 and 2000 are reported. Treatment was broken down into five categories: workup, chemotherapy, preparation of radiation therapy, and application of radiation. For each category, costs were computed. Nasopharyngeal cancer treatment costs were compared with costs previously reported on patients treated for cancers of the oral cavity, larynx, and oropharynx. RESULTS With the addition of neoadjuvant chemotherapy and high cumulative doses of radiation (77-81 Gy) with brachytherapy, disease-free survival increased from 48% to 74% (p=0.002), and overall survival increased from 35% to 72% (p=0.005). The Rotterdam protocol has been implemented stepwise: as of 1991, costs per patient increased from 4521 Euros (US


Technology in Cancer Research & Treatment | 2007

Robotic Radiosurgery vs. Brachytherapy as a Boost to Intensity Modulated Radiotherapy for Tonsillar Fossa and Soft Palate Tumors: The Clinical and Economic Impact of an Emerging Technology

Wideke Nijdam; Peter C. Levendag; Donald Fuller; Raymond Schulz; Jean-Briac Prévost; Inge Noever; Carin A. Uyl-de Groot

5023; 2001 exchange rate [December]: 1 Euro approximately 0.88 US


Journal of Neuro-oncology | 2011

A microcosting study of microsurgery, LINAC radiosurgery, and gamma knife radiosurgery in meningioma patients

Siok Swan Tan; Erik van Putten; Wideke Nijdam; Patrick Hanssens; G.N. Beute; Peter Nowak; Clemens M.F. Dirven; Leona Hakkaart-van Roijen

) for conventional external beam radiation therapy to 13,728 Euros (US


International Journal of Radiation Oncology Biology Physics | 2004

Brachytherapy versus surgery in carcinoma of tonsillar fossa and/or soft palate: late adverse sequelae and performance status: can we be more selective and obtain better tissue sparing?

Peter C. Levendag; Wideke Nijdam; Inge Noever; Paul I.M. Schmitz; Marjan van de Pol; Dick Sipkema; Cora Braat; Maarten F. de Boer; Peter P. Jansen

15,253) in 2000 for combinations of chemotherapy, conventional external beam radiation therapy, and brachytherapy. In case of stereotactic radiotherapy, the cost was 14,516 Euros (US


International Journal of Radiation Oncology Biology Physics | 2006

Interstitial radiation therapy for early-stage nasal vestibule cancer: a continuing quest for optimal tumor control and cosmesis.

Peter C. Levendag; Wideke Nijdam; Sanne E. Moolenburgh; Lisa Tan; Inge Noever; Peter van Rooy; Marc A.M. Mureau; Peter P. Jansen; Kai Munte; Stefan O.P. Hofer

16,495). CONCLUSIONS Costs for cancer in the nasopharynx vary from 14,528 Euros (US


International Journal of Radiation Oncology Biology Physics | 2004

Cost analysis comparing brachytherapy versus surgery for primary carcinoma of the tonsillar fossa and/or soft palate

Wideke Nijdam; Peter C. Levendag; Inge Noever; Carin A. Uyl-de Groot; Michel van Agthoven

16,509) to 15,316 Euros (US


Radiotherapy and Oncology | 2005

Cancer in the oropharynx: cost calculation of different treatment modalities for controlled primaries, relapses and grade III/IV complications.

Wideke Nijdam; Peter C. Levendag; Inge Noever; Carin A. Uyl-de Groot; Michel van Agthoven

17,405) in case of brachytherapy and stereotactic radiotherapy, respectively, if follow-up costs are added. The treatment cost for other head and neck sites was 21,858 Euros (US


Brachytherapy | 2004

Radical radiotherapy compared with surgery for advanced squamous cell carcinoma of the base of tongue

Marjan van de Pol; Peter C. Levendag; Remco de Bree; Jan Huib Franssen; L.E. Smeele; Wideke Nijdam; Peter P. Jansen; C.A. Meeuwis; C. René Leemans

24,126). Given the improvement in survival, the sparing capabilities of current high-dose, high-precision radiotherapy techniques, and the favorable cost profile compared with other sites, it is argued that costs should not be considered prohibitive for the introduction of chemotherapy and high-technology-based radiotherapy in advanced nasopharyngeal cancer.


Brachytherapy | 2005

Longitudinal changes in quality of life and costs in long-term survivors of tumors of the oropharynx treated with brachytherapy or surgery

Wideke Nijdam; Peter C. Levendag; Inge Noever; Paul I.M. Schmitz; Carin A. Uyl-de Groot

As a basis for making decisions regarding optimal treatment for patients with tonsillar fossa and soft palate tumors, we conducted a preliminary investigation of costs and quality of life (QoL) for two modalities [brachytherapy (BT) and robotic radiosurgery] used to boost radiation to the primary tumors following external beam radiotherapy. BT was well established in our center; a boost by robotic radiosurgery was begun more recently in patients for whom BT was not technically feasible. Robotic radiosurgery boost treatment has the advantage of being non-invasive and is able to reach tumors in cases where there is deep parapharyngeal tumor extension. A neck dissection was performed for patients with nodal-positive disease. Quality of life (pain and difficulty swallowing) was established in long-term follow-up for patients undergoing BT and over a one-year follow-up in robotic radiosurgery patients. Total hospital costs for both groups were computed. Our results show that efficacy and quality of life at one year are comparable for BT and robotic radiosurgery. Total cost for robotic radiosurgery was found to be less than BT primarily due to the elimination of hospital admission and operating room expenses. Confirmation of robotic radiosurgery treatment efficacy and reduced morbidity in the long term requires further study. Quality of life and cost analyses are critical to Health Technology Assessments (HTA). The present study shows how a preliminary HTA of a new medical technology such as robotic radiosurgery with its typical hypofractionation characteristics might be based on short-term clinical outcomes and assumptions of equivalence.


European Journal of Cancer | 2005

Costs of treatment intensification for head and neck cancer: Concomitant chemoradiation randomised for radioprotection with amifostine

Marijel Braaksma; Michel van Agthoven; Wideke Nijdam; Carin A. Uyl-de Groot; Peter C. Levendag

The aim of the present study is to determine and compare initial treatment costs of microsurgery, linear accelerator (LINAC) radiosurgery, and gamma knife radiosurgery in meningioma patients. Additionally, the follow-up costs in the first year after initial treatment were assessed. Cost analyses were performed at two neurosurgical departments in The Netherlands from the healthcare providers’ perspective. A total of 59 patients were included, of whom 18 underwent microsurgery, 15 underwent LINAC radiosurgery, and 26 underwent gamma knife radiosurgery. A standardized microcosting methodology was employed to ensure that the identified cost differences would reflect only actual cost differences. Initial treatment costs, using equipment costs per fraction, were €12,288 for microsurgery, €1,547 for LINAC radiosurgery, and €2,412 for gamma knife radiosurgery. Higher initial treatment costs for microsurgery were predominantly due to inpatient stay (€5,321) and indirect costs (€4,350). LINAC and gamma knife radiosurgery were equally expensive when equipment was valued per treatment (€2,198 and €2,412, respectively). Follow-up costs were slightly, but not significantly, higher for microsurgery compared with LINAC and gamma knife radiosurgery. Even though initial treatment costs were over five times higher for microsurgery compared with both radiosurgical treatments, our study gives indications that the relative cost difference may decrease when follow-up costs occurring during the first year after initial treatment are incorporated. This reinforces the need to consider follow-up costs after initial treatment when examining the relative costs of alternative treatments.

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Dive into the Wideke Nijdam's collaboration.

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Peter C. Levendag

Erasmus University Rotterdam

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Inge Noever

Erasmus University Rotterdam

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Michel van Agthoven

Erasmus University Rotterdam

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Peter P. Jansen

Erasmus University Rotterdam

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Marjan van de Pol

Erasmus University Rotterdam

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C.A. Meeuwis

Erasmus University Rotterdam

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Ca Uyl-de Groot

Erasmus University Rotterdam

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Paul I.M. Schmitz

Erasmus University Rotterdam

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C. René Leemans

VU University Medical Center

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