1. Registration

I am participating in the 20km of Brussels on 31 May to support breast cancer research.


  • Basic participation fee (bib + T-shirt + healthy drinks and food)

  • Basic participation fee + €250 donation (tax deductible) towards research

Who are we

BIG against breast cancer is the philanthropy department of Breast International Group (BIG), an international non-profit organisation for academic breast cancer research groups from around the world.

BIG’s mission is to facilitate and accelerate breast cancer research internationally.

Linked to over 3.000 hospitals and 10.000 breast cancer experts, BIG is the largest international network dedicated solely to breast cancer.
We collaborate with one same ambition: find a cure to breast cancer!

2. My details

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Respect of your privacy

The personal data collected by BIG through this form is required to send your tax receipt. 

In accordance with the General Data Protection Regulation (GDPR) (EU) 2016/679, BIG-aisbl informs you that you may exercise anytime your right of access, rectification, restriction, objection, data portability and your right to erasure regarding your personal data collected by BIG. 

To exercise the rights above, please contact us on following address:
BIG Data Protection Officer
BIG against breast cancer (BIG)
Blvd de Waterloo 76
B-1000 Brussels
Tel + 32 2 486 16 00
To know more about how BIG processes personal data, please read our Privacy Policy.

3. My payment

Payment Platform 100% Secure

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Expiry date

The 3 digit security code is located on the back of your card

How will your donation be used?

Between 2012 and 2018 we invested more than € 97,000,000 in the search for better treatments for breast cancer.

94.7% of the amounts received by BIG go directly to research.

Do you prefer to make a classic bank transfer? Our IBAN number is BE08 0689 0916 0213.

Thank you very much for your support.