Everything on Cancer Explained

One page, the whole platform: 4,521+ free resources — articles, journeys, tools, guides, downloads, and games — built mostly from National Cancer Institute content, all free, all in plain language.

More hubs & specialty pages

Focused pages that live outside the five main navigation pillars.

Learn about cancer

3010 plain-language articles across 28 topics, many of them built from National Cancer Institute resources.

Learning journeys & personalized start

10 step-by-step learning journeys (104 modules) that track your learning — never your health.

Tools

Interactive helpers that prepare you for real conversations with your care team. Everything stays on your device.

Clinical Trials Education Center

22 guide sections, 22 FAQs, 18 terms, and 10 cancer-specific education hubs. Educational only — never recommendations.

Side Effect Library

Side effects explained — what they are, why they may happen, and questions to ask your care team.

Play & practice

12 game lessons, knowledge checks for every article, and flashcards — learning that feels helpful, never like homework.

Downloads & printables

45 download-center resources and 40 printable one-pagers — checklists, trackers, note pages, and guides.

News & fresh content

984 news explainers connecting current events to trustworthy cancer education.

Support & comfort

For patients, caregivers, and everyone holding someone's hand through this.

Give & share support

50 free e-card designs plus giving options that keep all of this free.

Trust & transparency

How this site is made, sourced, and kept honest.

What’s new — changelog

How Cancer Explained has grown, release by release.

October 25, 2026
More source checks on answers and news stories
- We kept checking our answers, news stories and pages about public figures against the sources they cite. Details we could not confirm were removed or softened, and several numbers, dates and descriptions were corrected.
- Corrected numbers, dates and descriptions on hundreds of pages, and held back a few pages whose central claim we could not confirm.
October 23, 2026
Faster help for serious side effects
- An outside review found guides that told readers to wait a day or two before calling about symptoms their own medicine labels say to report right away. We moved those symptoms to "call right away" and made the tools safer.
- Rash that blisters or peels, new vision changes, infections or easy bruising after CAR T-cell therapy, reduced urine on Pluvicto or cisplatin, and fever with kidney treatment now say to call right away.
- Ask now gives poison-control and care-team guidance at once when someone says an extra or double dose of a cancer medicine was taken.
- The symptom guide now shows a fever warning for people on cancer treatment, and offers separate blood in the stool and blood in the urine choices.
October 22, 2026
More source checks on answers and news stories
- We kept checking our answers, news stories and pages about public figures against the sources they cite. Details we could not confirm were removed or softened, and several numbers, dates and descriptions were corrected.
- Corrected numbers, dates and descriptions on hundreds of pages, and held back a few pages whose central claim we could not confirm.
October 20, 2026 (more answers)
Source checks on 270 more answers
- We re-checked another 270 short Q&A answers against the official pages they cite, which completes the review of our question library. Unconfirmed claims were softened or removed, and a few numbers and wordings were corrected.
- The lung cancer and smoking answer now cites CDC for radon and drops statistics we could not confirm.
- Corrected the PSA screening answer to name BRCA2, as NCI does, and removed age cutoffs we could not confirm.
October 20, 2026 (trial and research news)
Source checks on 196 clinical-trial and research stories
- We re-checked 196 of our clinical-trial and research news stories against trial records, published abstracts and NCI and FDA pages. Claims we could not confirm were softened or removed, and several numbers, dates and wordings were corrected.
- An mRNA melanoma vaccine story now shows the correct randomization and survival figures.
- The artificial sweeteners story no longer repeats figures that the journal later corrected.
- Two pancreatic cancer stories now say the drug daraxonrasib has been FDA approved.
October 20, 2026 (health news checks)
Source checks on 117 more health news stories
- We re-checked another 117 news stories, mostly awareness months, studies and public-health explainers, against the official pages they cite. Claims we could not confirm were softened or removed, and several numbers and wordings were corrected.
- The pancreatic cancer awareness story no longer says NCI has no screening information; it now says NCI does not recommend screening at average risk.
- Updated younger-adult cancer trend numbers and the pancreatic cancer survival figure to match SEER.
- Removed or softened claims in many film and TV cancer stories that we could not confirm.

Everything here is educational only — not medical advice. Cancer Explained does not diagnose, recommend treatment, or replace your healthcare team. Most content is based on National Cancer Institute resources; NCI does not endorse this site.