The short answer
Surgery, when used to treat cancer, is a procedure in which a surgeon removes cancer from your body. It works best for solid tumors that are contained in one area. Surgery may be open, with one large cut, or minimally invasive, with a few small cuts. Anesthesia keeps you from feeling pain during the procedure.
Surgery is a procedure in which a surgeon removes cancer from your body.
It works best for solid tumors contained in one area and is a local treatment.
Surgery may be open (one large cut) or minimally invasive (a few small cuts).
Anesthesia keeps you from feeling pain during surgery.
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The full explanation.
The simple version
Surgery, when used to treat cancer, is a procedure in which a surgeon removes cancer from your body. Surgeons are medical doctors with special training in surgery.
Surgery works best for solid tumors that are contained in one area. It is a local treatment. That means it treats only the part of your body with the cancer. It is not used for leukemia (a type of blood cancer), or for cancers that have spread.
Surgery removes cancer from your body and works best for solid tumors in one area.
How surgery is performed
Surgeons often use small, thin knives, called scalpels, and other sharp tools to cut the body. Surgery often means cutting through skin, muscles, and sometimes bone. After surgery, these cuts can be painful and take some time to heal.
Anesthesia keeps you from feeling pain during surgery. Anesthesia means drugs or other substances that cause you to lose feeling or awareness. There are three types:
- Local anesthesia causes loss of feeling in one small area of the body.
- Regional anesthesia causes loss of feeling in a part of the body, such as an arm or leg.
- General anesthesia causes loss of feeling and a complete loss of awareness that seems like a very deep sleep.
Some treatments do not use scalpels. Cryosurgery uses extreme cold to destroy abnormal tissue. Lasers are powerful beams of light that cut through tissue. Hyperthermia exposes tissue to high temperatures. And photodynamic therapy uses drugs that react to light.
Types of surgery
There are many types of surgery. They differ by purpose, by the part of the body, by how much tissue must come out, and sometimes by what the patient prefers. Surgery may be open or minimally invasive:
- In open surgery, the surgeon makes one large cut to remove the tumor, some healthy tissue, and maybe some nearby lymph nodes.
- In minimally invasive surgery, the surgeon makes a few small cuts instead of one large one. They insert a long, thin tube with a tiny camera, called a laparoscope, into one of the cuts. The camera shows the inside of the body on a monitor. Special tools go through the other cuts to remove the tumor and some healthy tissue.
Minimally invasive surgery uses smaller cuts, so it takes less time to recover from than open surgery.
Smaller cuts usually mean a shorter recovery.
How surgery works against cancer
Surgery can do several jobs, depending on your type of cancer and how advanced it is:
- Remove the entire tumor when the cancer is contained in one area.
- Debulk a tumor by removing some, but not all, of it. This is used when removing the entire tumor might damage an organ or the body. Removing part of a tumor can help other treatments work better.
- Ease cancer symptoms by removing tumors that are causing pain or pressure.
Sometimes surgery is the only treatment you need. More often, you will also have other cancer treatments.
Risks of surgery
Surgeons are highly trained and will do everything they can to prevent problems. Sometimes problems still occur. Common ones are:
- Pain. After surgery, most people have pain in the part of the body that was operated on. Your doctor or nurse can help you manage it. Talk with them before surgery about pain control, and afterward tell them if your pain is not controlled.
- Infection. To help prevent infection, follow your nurse's instructions about caring for the area where you had surgery. If you develop an infection, your doctor can prescribe a medicine (an antibiotic) to treat it.
Other risks include bleeding, damage to nearby tissues, and reactions to the anesthesia. Talk to your doctor about the possible risks for your type of surgery.
What to expect
Before surgery, a nurse may call to tell you how to prepare. They will also tell you about tests you need, such as blood tests, a chest x-ray, or an electrocardiogram (ECG). You may not be able to eat or drink for a certain period before surgery. Follow these instructions closely, or your surgery may need to be rescheduled.
During surgery, once you are under anesthesia, the surgeon removes the cancer. Usually some healthy tissue around it comes out too. That helps improve the chances that all the cancer has been removed. The surgeon might also remove lymph nodes or other nearby tissues. Those are checked under a microscope to see whether the cancer has spread.
After surgery, the nurse will tell you how to control pain. They will tell you which activities to do and avoid, how to care for your wound, how to spot signs of infection, and when you can return to work. You will have at least one more visit with the surgeon a week or two after you go home. Ask when the pathology report from the operation will be ready and when you will go through it together. That report adds detail the biopsy could not, including the margins and any lymph nodes that were removed. It is also fair to ask how often the surgeon and the hospital do your particular operation.
Eating and working after surgery
Surgery increases your need for good nutrition. If you are weak or underweight, you may need a high-protein, high-calorie diet before surgery. Some surgeries change how your body uses food. That is especially true of surgery of the mouth, stomach, intestines, or throat. If you have trouble eating, you may be given nutrients through a feeding tube or IV. A dietitian can help.
You will need to take time off work to have and recover from surgery. It may be one day, or many weeks. How long depends on the type of anesthesia, the type and extent of the surgery, and the kind of work you do. If you expect a longer recovery, talk with your employer about medical leave.
When to get help sooner
- Call 911 or go to an emergency department if your wound splits open, if bleeding soaks through a dressing and will not stop with pressure, or if you get sudden chest pain or breathlessness after an operation.
- Call your care team the same day if the wound area grows more red, swollen or painful, if drainage thickens or turns tan, green or yellow, if it smells bad, or if your temperature reaches 100.4°F (38°C) or higher.
- One exception on that fever line: if chemotherapy is part of your plan and you have had a dose in the past few weeks, do not wait for a call back. A temperature of 100.4°F (38°C) or higher then needs an emergency department the same hour, because chemotherapy can leave you without the white cells to hold an infection back.
- Call your care team within a day or two if the wound looks darker or drier than before, if red streaks spread out from it, or if pain relief at home has stopped working well enough for you to move around.
Source: MedlinePlus — Surgical wound care, open and CDC — Fever and Cancer Treatment
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Common questions
How does surgery treat cancer?
Surgery removes cancer from your body. Depending on your cancer and how advanced it is, it can be used to remove the entire tumor, remove part of a tumor (called debulking), or ease symptoms by removing tumors that cause pain or pressure.
Will I feel pain during surgery?
No. Anesthesia keeps you from feeling pain during surgery. Anesthesia refers to drugs or other substances that cause you to lose feeling or awareness. There are three types: local, regional, and general anesthesia.
What is the difference between open and minimally invasive surgery?
In open surgery, the surgeon makes one large cut. In minimally invasive surgery, the surgeon makes a few small cuts and uses a thin tube with a tiny camera, called a laparoscope, to see inside. Because the cuts are smaller, minimally invasive surgery usually takes less time to recover from.
Is surgery used for all cancers?
No. Surgery works best for solid tumors that are contained in one area. It is a local treatment, meaning it treats only the part of your body with the cancer. It is not used for leukemia (a type of blood cancer) or for cancers that have spread.
What are the risks of cancer surgery?
Common problems are pain and infection. After surgery, most people have pain in the part of the body operated on, and your team can help you manage it. Other risks include bleeding, damage to nearby tissues, and reactions to the anesthesia.
How long will it take to recover from surgery?
It depends on the type of surgery, how extensive it is, the type of anesthesia, and the kind of work you do. You may need only one day off or many weeks. Ask your doctor how long you will need to recover.
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Last updated: 2026-08-13Next planned review: 2027-01-02
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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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