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Every year, 9.000 people in the Netherlands are diagnosed with blood cancer.
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42 million people worldwide, among which 426.000 Dutch residents, are already registered as stem cell donor.
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Only 30% of patients who need a stem cell transplant can find a fully matched donor within their family.
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A match between two random individuals is rare. That’s why every new donor counts. Each registration brings new hope for someone in need of a life-saving transplant.
”GenDx Goes the Extra Mile in September

2026
GenDx went the extra mile in September, the month of World Marrow Donor Day. This year, we brought our signature Tulip Run back to home turf, organizing the GenDx Tulip Run at Utrecht Science Park, in collaboration with Sports Center Olympos and the World Marrow Donor Association (WMDA). Colleagues in Utrecht came together for a 5K run or 3K walk through the Utrecht Botanical Gardens, raising funds to help strengthen donor registries and make stem cell transplantation accessible to patients around the globe. But that is not all! Our colleagues abroad also put on a GenDx T-shirt to run or walk in Stockholm, the US and even Sydney. A true global team effort!
Together, we raised €5.358,40 for the World Marrow Donor Association.
This donation will be used to help establish (access to) registries in countries where this is most needed.
Click here to learn more about the 2026 edition.
From 2018 to Today: The Evolution of GenDx Stem Cell Donor Recruitment Initiative
The first stem cell donor recruitment initiative was organized in 2018, in collaboration with Matchis. The initiative perfectly aligns with GenDx’s mission of enhancing the quality of life and survival chances for transplant patients. Our primary objective is to increase the number of potential stem cell donors in the global registry, to increase the probability of finding a donor for every patient in need.
In 2022, the initiative not only led to 129 new registrations, GenDx also donated €4,515 to Matchis in order to cover the costs of these registrations.
In 2023, 71 new potential donors registered, which corresponded to a donation of €2,485 to the Matchis foundation.
In 2024, the Stem Cell Donor Recruitment Day was organized in collaboration with the TxMiller Foundation, and took place on September 19th. Highlights of this edition included a webinar, hosted by Ferdi Stofmeel, featuring Bert Elbertse (Matchis), a donor and recipient. We also strengthened our collaboration with the Hogeschool Utrecht and various Utrecht-based study and student (sport) associations.
In 2025, GenDx went the extra mile during our first ‘Fit to Donate’ initiative. Inspired by our signature Tulip Run, normally organized during conferences like ASHI and EFI, the GenDx team laced up their shoes to raise money for Matchis (the Dutch Center for Stem Cell Donors). Together, we raised €3.850, which translates to supporting 110 new donors being added to the stem cell donor registry.
By joining forces, we can achieve our shared goal of motivating as many young and healthy individuals as possible to become part of the stem cell donor registry.
Easy as 1-2-3
Learn how easy it is to register!
REGISTER*
Complete the online registration form (Matchis).
CONFIRM
Make sure to complete your registration! Matchis will send you an e-mail with a confirmation link.
SWAB
To determine your unique HLA type, a set of 3 buccal swabs will be sent to your home address. Swab the inside of your cheek and return the swabs to Matchis, using the return envelope.
* Please note that donor registries are country-specific.
Dutch residents can join the registry via the Matchis foundation (Dutch Centre for Stem Cell Donors). If you want to join the registry, and you are not living in the Netherlands, we encourage you to have a look at this list of worldwide registries to find out which organization handles the registry in your country of residence.
Videos
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Learn more
World Marrow Donor Association (WMDA)
How stem cell donation works (Matchis)
Transplant Basics (Be The Match)
FAQ’s (Matchis)


