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Cancer of Unknown Primary: Surgery

During cancer surgery, a tumor or tumors are removed from your body. Most of the time, the surgeon tries to take out all the cancer and an edge (margin) of normal tissue around it. Surgery is usually done for cancer that’s easy to reach and only in 1 place. For instance, it may be done for a skin growth or a lymph node that the surgeon can feel with their fingers.

When surgery may be an option

Cancer of unknown primary (CUP) has already spread by the time it’s found. So surgery is seldom the only treatment used. But it might be considered in some cases. These may include if cancer is found in your lymph nodes or in an organ where your surgeon is able to remove all of it. Surgery may also be done for biopsies to diagnose and help find out the extent of a cancer. Surgery may also be used to help relieve symptoms caused by the tumor, such as pain or other problems (like a blocked intestine or broken bone). 

Types of surgery used for cancer of unknown primary

There are many different ways to use surgery to treat CUP. The type of surgery done depends on where the cancer is, where it has spread, and what the goal of the surgery is.

If your healthcare provider suggests surgery, be sure you understand how the surgery will be done. You should also understand the goal of the surgery and its benefits and risks. 

Possible side effects from surgery for cancer of unknown primary

Like other cancer treatments, surgery can cause side effects. These depend on what kind of surgery you have and where in your body the surgery is done.

Side effects can include:

  • Pain at the surgical site (incision)

  • Skin irritation and bruising where the surgery was done

  • Infection

  • Bleeding, either inside your body or at the incision

  • Blood clots

  • Damage to nearby organs or tissues

  • Reactions to the anesthesia. These are the medicines used to make you sleep during surgery.

Tell your healthcare provider if you have any side effects. There are often ways to treat them. If you have poor health and nutrition, you may have an increased risk for infection. You may also have problems with wound healing.

Getting ready for your surgery

Your healthcare team will talk with you about your surgery options. Bring a family member or close friend with you to check-ups to help ask questions and listen to your treatment plan. Write down questions you want to ask about your surgery. Make sure to ask:

  • What type of surgery will be done?

  • What is the extent of the cancer and has it spread?

  • What's the goal of surgery?

  • Will the surgery change the way my body works? (This may happen if an organ is removed.)

  • What are the risks and side effects of the surgery?

  • When can I return to my normal activities?

  • Will the surgery leave scars and what will they look like?

  • Will I need to stay in the hospital? If so, how long?

Before surgery, tell your healthcare team if you’re taking any medicines. These include over-the-counter medicines, vitamins, herbs, and other supplements. This is to make sure you’re not taking medicines that could affect the surgery. After you’ve talked about all the details with the surgeon, you’ll sign a consent form that says that the healthcare provider can do the surgery.

You’ll also meet the anesthesiologist. You can ask them questions about the anesthesia and how it will affect you. Just before your surgery, you’ll get anesthesia. This is so you fall asleep and don’t feel pain.

After your surgery

You may have to stay in the hospital for a few days. This depends on the type of surgery. For the first few days after surgery, you’re likely to have pain. It can be controlled with medicine. Talk with your healthcare team about your options for pain relief. Some people don’t want to take pain medicine. But doing so can help your healing. If you don’t control pain well, you may not want to cough, turn over often, or get out of bed, for instance. You need to do these things as you heal.

You may have diarrhea. Talk with your healthcare provider, nurse, or a dietitian about what you can eat to help. You may have constipation. This can be caused by pain medicine, from not moving much, or from not eating much. Talk with your healthcare team about getting more fiber or using a stool softener.

You may feel tired or weak for a while. The amount of time it takes to heal from surgery is different for each person.

Recovering at home

When you get home, you may get back to light activity. But you may have to avoid strenuous activity for a while. Your healthcare team will tell you what kinds of activities are safe for you while you heal. They'll also tell you how to care for your incision, when you can shower, and when it's safe for you to drive.

Follow-up care

You may need radiation or chemotherapy after surgery. Your healthcare provider will talk with you about this. They will help you make appointments, if needed.

When to call your healthcare provider

Tell your healthcare provider right away if you have any signs of problems after surgery. Symptoms can include:

  • Bleeding

  • Redness, swelling, or fluid leaking from the incision

  • Fever of 100.4°F (38°C) or higher, or as directed by your healthcare provider

  • Chills

Be sure you know what other problems to watch for. Know how to contact your healthcare provider after office hours and on weekends.

Online Medical Reviewer: L Renee Watson MSN RN
Online Medical Reviewer: Todd Gersten MD
Date Last Reviewed: 6/1/2021
© 2022 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare provider's instructions.
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