Understanding Cancer Survival Statistics

Maybe you were just given a cancer diagnosis. Maybe you are searching for what to expect. Either way, you may be tempted to look up a "survival rate" right away. Before you do, it helps to know what that number is, and what it is not.

A cancer survival statistic, like a "5-year relative survival rate," describes a large group of people. Those people were diagnosed with a certain cancer years ago. Researchers followed that group and recorded how many were still alive 5 years later. The result is a group-level measurement. It is not a prediction about any one person, including you.

This page explains how to read these numbers well. It also links to stage-by-stage survival data for 22 cancer types, based on the National Cancer Institute's SEER program.

Relative survival compares two groups over the same stretch of time. One group has a specific cancer. The other group is the same age and sex, but does not have that cancer. Say a cancer's 5-year relative survival rate is 90%. That means people with that cancer were, as a group, about 90% as likely to be alive 5 years later as people without it.

This is different from "observed survival," which simply counts who is alive, whatever the cause of death. Relative survival tries to isolate the effect of the cancer itself. It adjusts for deaths from other causes, like heart disease or accidents, that would happen anyway.

Two things follow from this. First, relative survival is not the share of people who are cured, or cancer-free. Some people counted as "survived" are still living with cancer or still having treatment. Second, "5 years" is not a life expectancy or a deadline. It is simply the time window researchers use so that studies can be compared. Those studies cover different cancers and come out in different years. Many people live well beyond 5 years, and for many cancers a large share of people are effectively cured.

Most cancer statistics pages, including SEER's, publish two kinds of number. One is an "all stages combined" figure. The others are separate figures for localized, regional, and distant disease.

• Localized means the cancer is found only in the organ where it started.
• Regional means it has spread to nearby tissue or lymph nodes.
• Distant means it has spread to organs or tissues far from where it started; this is also called metastatic disease.

An all-stages number blends everyone in these groups together. Localized and distant disease can have very different outlooks. So that blended number can mislead on its own. If you find stage-specific data for your cancer, it is almost always more useful than the single overall figure. Even so, "summary stage" categories are still a simplification. For some cancers, like brain tumors or multiple myeloma, other things matter more than this staging system captures. Tumor type, grade, and genetics are examples. The cancer-specific pages linked below explain where that applies.

To measure "5-year" survival, researchers have to follow a group of people for at least 5 years after diagnosis. Then they collect, check, and publish the results. That process takes time on top of the 5 years itself.

So every published survival statistic describes people diagnosed several years ago. It reflects the treatments available at that time. It cannot reflect a drug approved last year, or a technique your own care team is using today. In some fields treatment is changing fast, such as immunotherapy for melanoma or lung cancer. There, current outcomes may be meaningfully better than the published numbers suggest.

A published statistic describes a group. Your outlook depends on things specific to you that a group average cannot capture:

• Stage — how far the cancer has spread at diagnosis.
• Grade — how odd the cancer cells look, and how quickly they tend to grow.
• Biomarkers and molecular subtype — features of the tumor, found through lab or genetic testing, that increasingly guide treatment for many cancers.
• How the cancer responds to treatment — early results often tell your care team more than the statistics at diagnosis did.
• Overall health — other health problems, age, and general fitness affect which treatments are possible and how you recover.
• Access to care — a quick diagnosis, specialist care, and being able to finish treatment all matter, whatever the cancer type.

Statistics can be a useful starting point for a conversation. They work best alongside your care team's knowledge of your own situation. It can help to:

• Ask for the stage-specific number, not just the overall average.
• Ask what has changed in treatment since the data was collected.
• Ask how your own test results, biomarkers, and health affect the general number.
• Decide together how much detail feels useful to you right now. Some people want every number. Others prefer the short version. Both are reasonable.

Looking up survival numbers can bring up fear, grief, or a flood of other feelings. That can happen even when the numbers are reassuring. The reaction is common and understandable. It does not mean you are coping "wrong." Cancer Anxiety and Uncertainty has more on coping with fear and uncertainty during cancer. It is also worth telling your care team how you're feeling, not just what you want to know.

Want a more data-dense, statistics-first version of the same topic? What a Five-Year Cancer Survival Rate Actually Means gives SEER's exact stage-by-stage figures for breast and pancreatic cancer, and shows how conditional survival changes over time.

Each page below explains SEER's 5-year relative survival data for one cancer type. Where a stage breakdown is meaningful, the page shows it. All of them use the same framing as this page.

• Breast cancer
• Lung cancer
• Colorectal cancer
• Prostate cancer
• Melanoma
• Bladder cancer
• Kidney cancer
• Uterine (endometrial) cancer
• Thyroid cancer
• Pancreatic cancer
• Liver cancer
• Stomach cancer
• Cervical cancer
• Ovarian cancer
• Esophageal cancer
• Testicular cancer
• Head and neck cancer
• Brain tumors
• Multiple myeloma
• Leukemia
• Lymphoma
• Mesothelioma

• National Cancer Institute — Understanding Cancer Prognosis
• National Cancer Institute SEER — Cancer Stat Facts
• National Cancer Institute SEER — Survival Statistics