The short answer
Basket and umbrella trials are newer designs based on tumor genetics. A basket trial tests one treatment across many cancer types with a shared mutation; an umbrella trial tests several treatments within one cancer type.
These designs match treatments to genetic changes in tumors.
A basket trial tests one treatment across many cancers sharing a mutation.
An umbrella trial tests several treatments within one cancer type.
Both rely on genetic testing of the tumor.
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The full explanation.
The simple version
Basket trials and umbrella trials are newer ways to run a cancer trial. Both group patients by the genetic makeup of their tumor. They do not group patients only by which organ the cancer started in. This grew out of biomarker testing. That testing shows cancers from different organs can share the same genetic change.
What a basket trial does
A basket trial tests one treatment across many cancer types. The one requirement: the tumors share a specific genetic change. For example, a basket trial might test a drug in lung, colon, and thyroid cancer patients together. This works if all their tumors carry the same mutation. The idea is simple. If a drug targets one mutation, it might work across any cancer type that shares it.
What an umbrella trial does
An umbrella trial works the other way. It focuses on one cancer type, like lung cancer. Within that one type, it tests several treatments at once. Each patient's treatment is matched to their own tumor's genetics. Under one umbrella study, a patient with one mutation gets one drug. Another patient, with the same cancer type but a different mutation, gets a different drug.
Why this approach matters
Older trials often needed many patients with the exact same cancer type. But some gene mutations are rare within any one cancer type. The same mutation can still show up across several cancer types combined. Basket and umbrella trials make it possible to study these rarer mutations. They pool patients across cancer types, or match treatments closely within one type. This can bring a promising, targeted treatment to patients faster than an older trial design would allow.
What this means for you
Your tumor may have been tested for specific gene changes. If so, you may qualify for a basket or umbrella trial. This can be true even for a cancer type with few trials of its own. This is one strong reason to ask about biomarker testing on your tumor. That testing does not just describe your cancer. It can open doors to treatment built around your tumor's own genetic profile.
These trials can feel confusing at first
It can feel strange to hear that your lung cancer trial also includes people with colon cancer or thyroid cancer. This is not a mix-up. It reflects how doctors now understand cancer at a deeper level: not only by where it started, but by what is driving it at the genetic level. Two tumors that look completely different under a microscope can, in some cases, respond to the exact same targeted drug.
Finding one of these trials
Ask your oncologist directly whether your specific mutation matches an open basket or umbrella trial. The National Cancer Institute's clinical trial search tool, at cancer.gov, lets you search by biomarker as well as by cancer type. A larger cancer center, especially one with a strong precision medicine or molecular tumor board program, is often more likely to have these specialized trials open.
Not every cancer type has one yet
Basket and umbrella trials are still a relatively newer approach, so they do not exist for every mutation or every cancer type yet. If none is currently open for your specific case, ask whether one is expected to open soon, and whether a more traditional trial or standard treatment makes sense for you in the meantime.
What to ask your doctor
Ask whether your tumor has been tested for biomarkers or gene mutations. Ask whether a basket or umbrella trial exists for your tumor's specific mutation, even outside your usual cancer type. Ask how a matched trial like this would differ from your standard treatment.
Sources
Words to know
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Common questions
What is a basket trial?
A basket trial tests a single treatment in people who have different types of cancer that all share the same genetic change, based on the idea that the mutation matters more than the organ.
What is an umbrella trial?
An umbrella trial studies people with one type of cancer and assigns different treatments depending on the specific genetic change found in each person's tumor.
How do I know if I qualify?
These trials depend on genetic testing of your tumor. Your oncologist can order or review that testing and check whether a matching trial is open.
Why were these designs created?
They make it possible to study treatments aimed at specific mutations more efficiently, which fits the growing field of precision oncology.
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Written by: Cancer ExplainedSources last checked: 2026-07-14 what this meansLast updated: 2026-08-10Next planned review: 2027-01-21
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How this page was created
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. We do not employ clinicians and do not intend to — our work 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 checked line by line against the sources listed on it. That confirms the sources support what the page says. 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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