Johan A F Koekkoek
VU University Medical Center
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Johan A F Koekkoek.
Neuro-oncology | 2015
Johan A F Koekkoek; Linda Dirven; Jan J. Heimans; Jaap C. Reijneveld; Martin J. B. Taphoorn
There is growing evidence that antitumor treatment contributes to better seizure control in low-grade glioma patients. We performed a systematic review of the current literature on seizure outcome after radiotherapy and chemotherapy and evaluated the association between seizure outcome and radiological response. Twenty-four studies were available, of which 10 described seizure outcome after radiotherapy and 14 after chemotherapy. All studies demonstrated improvements in seizure outcome after antitumor treatment. Eight studies reporting on imaging response in relation to seizure outcome showed a seizure reduction in a substantial part of patients with stable disease on MRI. Seizure reduction may therefore be the only noticeable effect of antitumor treatment. Our findings demonstrate the clinical relevance of monitoring seizure outcome after radiotherapy and chemotherapy, as well as the potential role of seizure reduction as a complementary marker of tumor response in low-grade glioma patients.
Cancers | 2016
Lara Fritz; Linda Dirven; Jaap C. Reijneveld; Johan A F Koekkoek; Anne M. Stiggelbout; H. Pasman; Martin J. B. Taphoorn
Despite multimodal treatment with surgery, radiotherapy and chemotherapy, glioblastoma is an incurable disease with a poor prognosis. During the disease course, glioblastoma patients may experience progressive neurological deficits, symptoms of increased intracranial pressure such as drowsiness and headache, incontinence, seizures and progressive cognitive dysfunction. These patients not only have cancer, but also a progressive brain disease. This may seriously interfere with their ability to make their own decisions regarding treatment. It is therefore warranted to involve glioblastoma patients early in the disease trajectory in treatment decision-making on their future care, including the end of life (EOL) care, which can be achieved with Advance Care Planning (ACP). Although ACP, by definition, aims at timely involvement of patients and proxies in decision-making on future care, the optimal moment to initiate ACP discussions in the disease trajectory of glioblastoma patients remains controversial. Moreover, the disease-specific content of these ACP discussions needs to be established. In this article, we will first describe the history of patient participation in treatment decision-making, including the shift towards ACP. Secondly, we will describe the possible role of ACP for glioblastoma patients, with the specific aim of treatment of disease-specific symptoms such as somnolence and dysphagia, epileptic seizures, headache, and personality changes, agitation and delirium in the EOL phase, and the importance of timing of ACP discussions in this patient population.
Case Reports | 2012
Johan A F Koekkoek; Ruud Wiggenraad; Hanneke Zwinkels; Martin J. B. Taphoorn; Rianne M Oosterkamp
Cerebral metastases from melanoma are generally associated with a dismal prognosis with survival ranging from 3 to 6 months after treatment. Systemic chemotherapy for these patients has limited effect and evidence for an overall survival benefit from randomised controlled trials is lacking. We report on a 59-year-old patient with a history of malignant melanoma who presented with multiple cerebral metastases after previous surgery and combined whole brain and stereotactic radiotherapy. She has been in sustained remission and in excellent clinical condition after treatment with continued cycles of oral temozolomide for more than 6 years. To our knowledge, similar prolonged survival has been described only once in patients with multiple cerebral metastases from melanoma. This case demonstrates that temozolomide for metastatic central nervous system (CNS) disease in melanoma patients may be highly effective without CNS toxicity.
Case Reports | 2013
Johan A F Koekkoek; Geert J Lycklama à Nijeholt; Korné Jellema; Rob Walchenbach
A 69-year-old woman presented with recurrent episodes of heavy epistaxis after previous head trauma. She reported a slowly progressive left-sided headache, a slightly swollen left eye and pulsatile tinnitus for 3 weeks. Her medical history showed a cerebral concussion with multiple facial fractures after a fall from her bicycle 3 months ago. On neurological examination, she had slight chemosis and proptosis of the left eye, an intracranial bruit on auscultation over the left orbit and bilateral extensor plantar responses. CT of the brain showed obliteration of the left sphenoid sinus with a small defect in its lateral wall and dilation of the left superior ophthalmic vein (SOV). Contrast-enhanced CT angiography (CT-A) clearly confirmed the dilation of the left SOV and enlargement …
Journal of Neuro-oncology | 2014
Johan A F Koekkoek; Linda Dirven; Jaap C. Reijneveld; Eefje M. Sizoo; H.R.W. Pasman; Tjeerd J. Postma; Luc Deliens; Robin Grant; Shanne McNamara; Wolfgang Grisold; E. Medicus; Günther Stockhammer; Stefan Oberndorfer; Birgit Flechl; Christine Marosi; M. J. B. Taphoorn; Jan J. Heimans
Journal of Neuro-oncology | 2014
Johan A F Koekkoek; Linda Dirven; Eefje M. Sizoo; H.R.W. Pasman; Jan J. Heimans; Tjeerd J. Postma; Luc Deliens; Robin Grant; Shanne McNamara; Günther Stockhammer; E. Medicus; M. J. B. Taphoorn; Jaap C. Reijneveld
Neuro-oncology | 2014
Johan A F Koekkoek; Linda Dirven; Jaap C. Reijneveld; H.R.W. Pasman; Shanne McNamara; Wolfgang Grisold; Günther Stockhammer; Christine Marosi; M. J. B. Taphoorn; Jan J. Heimans
Neuro-Oncology Practice | 2014
Johan A F Koekkoek; Linda Dirven; Jaap C. Reijneveld; Tjeerd J. Postma; Robin Grant; Andrea Pace; Stefan Oberndorfer; Jan J. Heimans; Martin J. B. Taphoorn
BMC Neurology | 2014
Johan A F Koekkoek; Linda Dirven; Jan J. Heimans; Tjeerd J. Postma; Maaike J. Vos; Jacoline E. C. Bromberg; Martin J. van den Bent; Jaap C. Reijneveld; M. J. B. Taphoorn
Neuro-oncology | 2017
Lara Fritz; Linda Dirven; Jaap C. Reijneveld; Johan A F Koekkoek; Hanneke Zwinkels; Anne M. Stiggelbout; H. Roeline W. Pasman; Martin J. B. Taphoorn