Personal profile
Research interests
1. Intestinal inflammation (specifically appendicitis). I am the principal investigator on basic/translational studies on intestinal inflammation, with a specific interest in appendicitis. Elements of my research are immunological responses and microbiome. Ultimately we hope to create new non-invasive diagnostic modalities that can accurately identify complex appendicitis in the pediatric population
2. Clinical studies on evidence-based medicine. These projects focus on evaluation the current clinical care in daily pediatric surgical practice in order to identify optimal diagnostic/treatment protocols.
3. Transitional medicine. Recently I have initiated together with dr J.P.M. Derikx a new transitional program for children with congenital colorectal malformations entitled Lifelong guidance. Furthermore, I am the prinicipal investigator of a new international initiative to optimize transitional medicine in Europe and abroad (EUPSA)
Education/Academic qualification
PhD, Appendicitis in children; new insights into an old problem, VU University, Amsterdam, Netherlands
Award Date: 6 Jun 2017
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Collaborations and top research areas from the last five years
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Non-operative treatment of children with simple appendicitis: long-term follow-up (5 years) in a prospective cohort study: long-term follow-up (5 years) in a prospective cohort study
Knaapen, M., van der Lee, J. H., Gaillard, E. L., Cense, H. A., in 't Hof, K. H., Kneepkens, C. M. F., Wijnen, M. H., Heij, H. A., Bakx, R., van Heurn, L. W. E. & Gorter, R. R., 5 Apr 2021, In: British journal of surgery. 108, 3, p. e99-e100Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile16 Downloads (Pure) -
International Core Outcome Set for Acute Simple Appendicitis in Children: Results of a Systematic Review, Delphi Study, and Focus Croups with Young People
Knaapen, M., Hall, N. J., Moulin, D., van der Lee, J. H., Butcher, N. J., Minneci, P. C., Svensson, J. F., St. Peter, S. D., Adams, S., Nah, S. A., Skarsgard, E. D., Zani, A., Emil, S., Suominen, J. S., Aziz, D. A., Rai, R., Offringa, M., van Heurn, E. W., Bakx, R. & Gorter, R. R., 1 Dec 2022, In: Annals of Surgery. 276, 6, p. 1047-1055 9 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile17 Downloads (Pure) -
The treatment of simple appendicitis in children: Advancing research to optimise treatment
Knaapen, M., 2021Research output: PhD Thesis › Phd-Thesis - Research and graduation internal
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Management of appendiceal mass and abscess in children; early appendectomy or initial non-operative treatment? A systematic review and meta-analysis
van Amstel, P., Sluckin, T. C., van Amstel, T., van der Lee, J. H., de Vries, R., Derikx, J. P. M., Bakx, R., van Heurn, L. W. E. & Gorter, R. R., 1 Dec 2020, In: Surgical endoscopy. 34, 12, p. 5234-5249 16 p.Research output: Contribution to journal › Review article › Academic › peer-review
Open AccessFile9 Downloads (Pure) -
Long-term gastrointestinal sequelae in patients who underwent surgery for congenital duodenal obstruction
Pijpers, A. G. H., Hogerwerf, M., Van den Bunder, F. A. I. M., Koppen, I. J. N., Van Heurn, E. L. W., Gorter, R. R., Musters, G. D. & Derikx, J. P. M., Dec 2026, In: Pediatric surgery international. 42, 1, p. 46 46.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile11 Downloads (Pure)
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EUropean Pediatric Surgery Association (EUPSA) (External organisation)
Gorter, R. (Chair)
2020 → …Activity: Membership › Membership of board › Academic
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Nederlandse Vereniging voor Heelkunde (External organisation)
Gorter, R. (Chair)
2020 → …Activity: Membership › Membership of committee › Academic
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Time frame of clinical recovery in patients undergoing successful non-operative treatment for uncomplicated appendicitis; A retrospective analysis of a prospective cohort study.
Knaapen, M. (Speaker), van der Lee, J. H. (Speaker), van Heurn, L. (Speaker), Bakx, R. (Speaker) & Gorter, R. (Speaker)
10 Nov 2017Activity: Talk or presentation › Oral presentation › Academic
Press/Media
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Voor kinderen met een darmziekte is de school-wc vaak een ramp
19/11/2024
1 Media contribution
Press/Media: Press / Media
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Het Amsterdamse Kinderbuikcentrum bestaat een jaar: ‘Ik heb weleens patiëntjes die drie weken lang niet poepen – vanwege een vieze school-wc’
08/08/2024
1 Media contribution
Press/Media: Press / Media
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Rocco is blij met centrum voor buikpijn: 'Werd gek van de krampen'
26/06/2023
1 Media contribution
Press/Media: Press / Media
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Nu Kinderbuikcentrum voor ernstige aandoeningen
14/06/2023
1 Media contribution
Press/Media: Press / Media
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Amsterdam UMC opent speciaal centrum voor kinderen met complexe buikproblemen
13/06/2023
1 Media contribution
Press/Media: Press / Media