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Irish Cancer Society
Show your support this October Donate now Freephone Support Line 1800 200 700
  • Get help and support
    • I’ve been diagnosed with cancer
    • I’m being treated for cancer
    • I have metastatic cancer
    • I care for someone with cancer
    • I have a child with cancer
    • I'm a teen or young adult with cancer
    • Your treatment journey
    • Coping with cancer
    • Welfare and Supports service
    • Life after cancer treatment
    View all our services
    Irish Cancer Society Daffodil Centre in a hospital
    Daffodil Centres

    Cancer information, support and advice at 13 locations nationwide.

    Find out more here
  • Cancer information
    • About cancer
    • Cancer types
    • Cancer prevention
    • Cancer signs and symptoms
    • Cancer screening
    • Cancer tests
    • Cancer treatments
    • Side-effects and symptoms
    • Children's cancer
    Support and resources
    • Resources for healthcare professionals
    • Booklets, leaflets and posters
    • Order booklets and publications
    • Video library
    Edel Brangan, Support Line Cancer Nurse. Edel looks direct to camera with a warm smile. Edel is wearing a headphone set, ready to receive calls.
  • About our work
    • Advocacy
    • Your stories
    • Our news
    • Our annual reports
    • Contact us
    • Work with us
    • Our Leadership
    Leave our leave campaigners
    Become an Advocacy Volunteer

    We are looking for people who can lend their voice to our vital advocacy campaigns.

    Find out more
  • Our research
    Megamenu About Cancer Research
    About our cancer research

    We support scientists and fund world-class cancer research.

    Learn more here
    Megamenu Research Hub
    Researchers’ Hub

    Discover our latest reasearch appeals and awards, or manage your grant.

    Visit our Researcher's Hub
    • Cancer myths
    • What research do we fund?
    • Patient and Public Involvement
    • Open calls for researchers
  • Ways to help
    Megamenu Make Donation
    Fundraise for us

    Help change the lives of people affected by cancer across Ireland.

    Learn more here
    • Volunteer with us
    • Become a monthly supporter
    • Become a corporate partner
    • Our charity shop locations
    • Lodge your funds
    • Leave a gift in your will
    • Tax efficient giving
    • Learn about Relay for Life
    • Shop wedding favours

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  2. What is cancer?

What is cancer?

This video explains what cancer is, including causes of cancer, the most common types of cancer, cancer treatments, and how to...
Video 2:30
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Oral anti-cancer medicines

8 videos View playlist details
Oral anti-cancer medicines
1
What is cancer?
What is cancer?
Video 2:30
2
Decoding cancer #1 — Why do people get cancer?
Decoding cancer #1 — Why do people get cancer?
Podcast 2:30
3
Immunotherapy and targeted therapies 4: Side-effects
Immunotherapy and targeted therapies 4: Side-effects
Video 2:30
4
Hurling For Cancer Research Highlights 2024
Hurling For Cancer Research Highlights 2024
Video 2:30
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Irish Cancer Society

We are a community of patients, survivors, volunteers, supporters, health and social care professionals and researchers. We are working towards a future where nobody in Ireland will die from cancer.

We won't stop until fewer people receive a cancer diagnosis, until everyone who does survives it and until everyone who needs it receives world class care and support. 
 

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Irish Cancer Society Head office, 43/45 Northumberland Road Dublin, D04 VX65 
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Show your support this October Donate now Freephone Support Line 1800 200 700
© 2025 Irish Cancer Society