Stage 4 Cancer: What It Means

By the Oncol.net editorial team · Last updated November 1, 2026

Stage 4 (written stage IV) usually means the cancer has spread from where it started to a distant part of the body. This is called metastatic cancer, or M1. It does not mean nothing can be done: most types have treatments, some people live for years, and a few stage 4 cancers can be cured. Across all cancers, about 35% of people diagnosed with distant-stage disease in 2015 to 2021 were alive 5 years later, relative to the general population.

Hearing "stage 4" is frightening. Below is what the term means, what it does not mean, and what to ask next. For the full system, see our guide to cancer stages.

What stage 4 means

Stage IV and stage 4 are the same thing. Staging uses Roman numerals. In the TNM system, most stage 4 cancers carry the label M1, meaning distant metastasis. Metastasis means cancer cells have traveled and formed new tumors elsewhere.

The cancer keeps its original name. Breast cancer that spreads to the lung is still stage 4 breast cancer, not lung cancer, and it is treated as breast cancer. That is why two people with tumors in the liver may get very different treatment.

Spread after a diagnosis is a little different. If a stage 2 cancer later spreads, your original stage stays on your record, and your doctors will call it metastatic or recurrent. Your care is then similar to that for stage 4. Our guide to how fast cancer spreads has more on timing.

Difference between stage 1 and stage 4 cancer

	Stage 1	Stage 4
Where the cancer is	Usually small and at its starting site	Usually at distant sites too
Typical TNM	Low T, N0, M0	Any T, any N, M1 in most cancers
Usual treatment	Local treatment, such as surgery or radiation, sometimes with drugs	Treatment through the whole body, such as drugs, sometimes with local treatment
Usual goal	Cure	Control, longer life, fewer symptoms. Cure in some cases

The gap varies a lot by cancer. See the survival table below, and compare localized and distant figures in our prognosis guide.

What IVA, IVB and IVC mean

Some cancers split stage 4 into letters. The letters mean different things in different cancers, so a stage IVB lung cancer and a stage IVB colon cancer are not comparable.

Cancer	IVA	IVB	IVC
Lung	Spread within the chest lining or other lung, or a single tumor outside the chest	Several tumors outside the chest	None
Colorectal	One distant site, not the peritoneum (abdominal lining)	Two or more distant sites, not the peritoneum	Peritoneum involved
Prostate	Nearby lymph nodes only, no distant spread	Distant spread	None
Ovarian	Cancer cells in the fluid around the lungs, with no other distant spread	Spread into the liver or spleen, to distant nodes, or to distant organs	None

Prostate cancer shows why it pays to ask. Stage IVA there is not metastatic. Stage 4 is also not used in the same way everywhere: breast cancer stage IV has no letters and simply means M1.

Treatment goals

The National Cancer Institute says there are treatments for most types of metastatic cancer, and some people live for years with well-controlled disease. The usual aims are to stop or slow growth, relieve symptoms and improve quality of life. Treatment depends on the original cancer, where it has spread, past treatments and your overall health. Options include chemotherapy, targeted therapy, immunotherapy, hormone therapy, radiation, surgery and clinical trials.

The American Cancer Society explains that advanced cancer usually cannot be cured, but some types can be controlled for long periods and managed like a chronic illness. A few may be curable. Examples:

Testicular cancer: it can spread and still be very curable. The National Cancer Institute notes that even patients with widespread metastases at presentation, including brain metastases, may have curable disease.
Colorectal cancer: surgery is curative in 25% to 40% of highly selected patients whose liver or lung metastases can be removed.
Lung cancer: at stage IVA, a single distant site, such as in the brain, may be treated directly with surgery or radiation along with treatment for the lung tumor.

It is fair to ask your oncologist directly: "Is the goal cure or control?" You can also ask for a second opinion.

Palliative care alongside treatment

Palliative care is not the same as giving up, and it is not the same as hospice. It treats pain, breathlessness, nausea, low mood and practical stress, for you and your family. You can have it at any stage while you keep getting cancer treatment.

Hospice begins when curative treatment is no longer the goal and the focus is only on quality of life. Palliative care can start at diagnosis.

The National Cancer Institute reports that adding palliative care soon after an advanced cancer diagnosis can improve quality of life and mood, and may even help people live longer. The American Society of Clinical Oncology recommends it for all patients with advanced cancer. Ask for a referral early.

Stage 4 survival by cancer type

The US SEER program does not report stage IV as such. It uses "distant," which is close to stage 4 but not identical. These are 5-year relative survival rates. They compare people with cancer to similar people in the general population.

Cancer	Distant-stage 5-year relative survival
Testicular (2015 to 2021)	72%
Thyroid	48.3%
Prostate	40.1%
Melanoma	34.0%
Breast (female)	33.8%
Ovarian	31.5%
Cervical	20.5%
Kidney	20.3%
Uterine	19.9%
Colorectal	16.9%
Lung	10.5%
Bladder	9.6%
Stomach	8.1%
Esophageal	5.3%
Liver	3.6%
Pancreatic	3.4%

Source: SEER Cancer Stat Facts, 2016 to 2022, except testicular, from American Cancer Society figures using SEER data.

How to read these numbers

They look backward. They describe people diagnosed years ago, so the newest treatments may not be counted. All-cancer distant-stage survival has about doubled, from 17% in the mid-1990s to 35%, and melanoma distant-stage survival rose from 16% to 35%.
They are averages. They mix older and younger people, and tumors with and without a helpful target. Biomarkers can change the picture a great deal within one cancer type.
Five years is not a limit. A 20% figure does not mean you have 5 years, or that you are in one group or the other. It only shows what happened in a large group at one point in time.
They use stage at diagnosis. They do not account for how your own cancer responds.

Your oncologist is the best person to tell you what applies to you. Some people want numbers and some do not. Either is fine. See our guide to prognosis and survival rates.

Questions to ask your team

What exactly is my stage, and where has the cancer spread?
Is the goal of treatment cure or control?
Has my tumor had biomarker testing?
Could any spots be treated with surgery or focused radiation?
Is there a clinical trial I should consider?
How will we know if treatment is working?
Can I see the palliative care team now?

Call your care team now if you have a fever of 100.4°F (38°C) or higher during treatment, new severe pain, new weakness or numbness in your legs, confusion, or vomiting that will not stop. Call 911 for severe trouble breathing or chest pain. See when to call your doctor.

Frequently asked questions

Does stage 4 mean terminal?

Not always. Stage 4 means the cancer has spread, not that a person has a set time left. Many stage 4 cancers cannot be cured, but most types have treatments, and some people live for years with well-controlled disease. A few stage 4 cancers, such as testicular cancer, can be cured.

Is stage 4 cancer curable?

Usually the goal is control rather than cure, but there are exceptions. Testicular cancer is often curable even after it spreads. Some people with colorectal cancer that has spread only to the liver or lungs can be cured with surgery. Ask your oncologist whether cure is possible for you.

What is the difference between stage 1 and stage 4 cancer?

Stage 1 cancer is usually small and has stayed where it started. Stage 4 cancer has usually spread to distant parts of the body. Stage 1 is often treated with surgery or radiation with the goal of cure. Stage 4 is usually treated with drugs that reach the whole body, with the goal of control.

How long can you live with stage 4 cancer?

It depends on the cancer type, where it has spread, how it responds to treatment and your overall health. Five-year relative survival for distant-stage cancer ranges from about 3% for pancreatic cancer to 72% for testicular cancer. Your oncologist can give a better estimate than any table.

Is stage 4 the same as metastatic cancer?

Usually. Most stage 4 cancers are metastatic. There are exceptions: stage IVA prostate cancer means spread to nearby lymph nodes only. Also, a cancer first found at an earlier stage that later spreads is called metastatic, but its original stage does not change.

Is there a stage 5 cancer?

No. For most solid tumors, the stages run from 0 to IV. Stage IV is the highest, and letters such as IVA and IVB add detail.

Can stage 4 cancer go into remission?

Yes, this can happen. Tests may show the cancer has shrunk or can no longer be found. Treatment may continue, and the cancer can return, so your team will keep checking. Ask what your scan results mean and what happens next.

Sources

This page is general information, not medical advice. Your care team knows your situation and should guide your decisions.