The short answer
Cancer between 15 and 39 arrives during big life transitions. NCI notes that fertility questions come up before treatment and that young adults often feel isolated.
The American Cancer Society projects 88,120 diagnoses in 2026 among people aged 15-39, about 4.2% of all cases (published in SEER Stat Facts).
NCI advises talking with a fertility specialist before treatment starts.
NCI says young adults often feel isolated because peers may not understand what they are going through.
Overall five-year relative survival for this age group is about 86% (NCI/SEER).
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Who this covers
NCI defines adolescents and young adults (AYAs) as people aged 15 to 39. The American Cancer Society projects 88,120 diagnoses in this age group in the United States for 2026. SEER Stat Facts publishes that count. It is about 4.2% of all cancer cases. The most common types are breast, thyroid and testicular cancer and melanoma. NCI reports overall five-year relative survival of about 86%. Death rates have fallen about 0.9% a year over 2014 to 2023.
Fertility, before treatment starts
Cancer treatment can put fertility at risk. NCI advises talking with a fertility specialist before treatment begins. Ask about this at your first appointment. Ask for a referral even if you are undecided. That keeps your options open. If nobody has raised it, ask your care team directly. NCI has detailed pages on fertility for girls and women and for boys and men.
Life transitions
Cancer in this age range often lands while people are starting college, starting a career or building independence. NCI notes that these years are a critical life phase. Ask your care team about a social worker or financial navigator early. They can help with school, work and costs. Ask whether any clinical trials might fit you.
The isolation
NCI states that young adults often feel isolated. Peers may not understand what they are going through. That can be sharpest during transitions like starting college or a career. Common experiences include:
- Being the youngest person in the waiting room.
- Friends whose lives continue on schedule while yours stops.
- Deciding when to tell someone you are dating.
- Changes in how your body looks, at an age when looks carry weight.
- Worry about fertility before you have thought about having children.
Concrete routes
Ask whether your cancer center has a program for adolescents and young adults. Ask for a referral if it does. Ask about support groups for people your age. Ask for a survivorship care plan when treatment ends, since late effects can appear years later. This information is general. Your care team can tell you what applies to you.
Sources
Common questions
Who counts as an adolescent or young adult with cancer?
NCI defines adolescents and young adults (AYAs) as people aged 15 to 39. For 2026 the American Cancer Society projects 88,120 such diagnoses in the United States, about 4.2% of all cancer cases (published in SEER Stat Facts).
When do I need to make a decision about fertility?
NCI says cancer treatment can affect fertility and advises talking with a fertility specialist before treatment starts. Raise it at your first appointment and ask for a referral, even if you are undecided.
What if nobody mentioned fertility to me?
Ask your care team directly, and ask soon. Treatment may already have begun, but it is still worth raising the question.
Where do I find other people my age with cancer?
Ask your care team whether your center has a program for adolescents and young adults, and whether they can refer you to a support group.
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Written by: Cancer ExplainedSources last checked: 2026-10-02 what this meansLast updated: 2026-10-02Next planned review: 2028-07-30
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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