A modified radical mastectomy is a type of mastectomy that your provider may use if breast cancer has spread beyond breast tissue and into your armpit (axillary) lymph nodes. It’s the same thing as a simple (total) mastectomy, except it also removes most or all of your axillary lymph nodes. In many cases, you can go home the same day.

A modified radical mastectomy (MRM) is a type of breast cancer surgery that removes your entire breast. This includes:

  • Your breast tissue
  • The lining of your main chest muscle
  • Your breast skin
  • Your nipple and areola

It also removes most or all of the lymph nodes in your underarm area (axillary lymph nodes). This is often the first place that breast cancer spreads.

Having a mastectomy can feel overwhelming, even when you know it’s the right step for your health. It’s OK to have questions or mixed emotions as you learn what the surgery involves. Your care team will be there to guide you, listen to your concerns and help you feel supported every step of the way.

Your surgeon might recommend this type of mastectomy if cancer is widespread throughout your breast tissue and lymph nodes. They want to remove any tissue where they think cancer may have spread.

Your provider may use modified radical mastectomy to treat:

  • Invasive ductal carcinoma
  • Invasive lobular carcinoma with axillary lymph node involvement
  • Locally advanced breast cancer, including inflammatory breast cancer

If your provider thinks a modified radical mastectomy is best for you, they’ll talk to you about how the surgery fits into your treatment plan. They might want to do other tests or treatments first. Or they might want to do other treatments after your surgery.

Your provider will discuss with you whether you want to have breast reconstruction after modified radical mastectomy. If so, they’ll work with you to figure out where that fits into the plan. It may happen during the mastectomy (immediate) or after cancer treatment (delayed).

Your provider might ask you to:

  • Stop smoking and drinking alcohol several weeks in advance
  • Stop taking certain medications several days in advance
  • Stop eating and drinking several hours in advance

You might also want to plan ahead for what happens after surgery. For example, you’ll need someone to drive you home. And you may want to arrange for someone to help you at home during recovery.

First, a healthcare provider will give you general anesthesia, so you won’t be aware of or feel any pain. Then, your surgeon will:

  1. Make a cut (incision) in your breast.
  2. Remove your breast tissue, chest muscle lining, skin, nipple and areola.
  3. Remove most — or very infrequently, all — of the lymph nodes under your arm. This is called an axillary lymph node dissection.
  4. Place one or more surgical drains to collect fluid.
  5. Close the incision.

If you and your surgeon planned for it, they’ll perform breast reconstruction before closing the incision.

A modified radical mastectomy may take two to three hours. It may take longer if you’re having reconstructive surgery at the same time. Your provider will tell you what to expect.

Treating breast cancer is a balancing act. Your provider wants to remove all the cancer without causing any more harm than they have to. Modified radical mastectomy has become less common. But there are still times when it may be necessary.

But more extensive surgeries do carry a higher risk of long-term complications. This is especially true when they involve your lymph nodes. Complications of modified radical mastectomy may include:

  • Breast skin wound problems
  • Body dysmorphia
  • Lymphedema
  • Phantom breast syndrome
  • Post-mastectomy pain syndrome

After surgery, you’ll spend some time at the hospital and have pain medication on demand in safe doses. Your healthcare team will watch for any problems. They’ll talk to you about what happens next in your treatment plan. They’ll also coach you on how to care for your wounds and surgical drains before you go home.

Once you’re home, your healthcare provider will advise you not to lift weight with your arms right away. But you’ll be up and walking a little each day. You’ll care for your wounds and drains for about two to three weeks. You’ll continue to feel tired and sore for about four to six weeks.

During your recovery, your healthcare provider will give you arm exercises to practice. These are important to recover your range of motion. Your nerves may continue to heal for several months. As they do, you may feel odd sensations in your chest sometimes, like tingling or twinges.

You’ll have scheduled follow-ups with your care team during your recovery. But be sure to contact them sooner if you develop signs of complications, like:

  • Unusual swelling
  • Worsening pain
  • Fever
  • Redness or discoloration in the surgical area

Be sure to contact them again if you have complications that last after you finish treatment. These may include lasting pain or mental health concerns. Your team will put you in touch with someone who can help.

  • American Cancer Society. Mastectomy (https://www.cancer.org/cancer/types/breast-cancer/treatment/surgery-for-breast-cancer/mastectomy.html). Last revised 3/31/2025. Accessed 11/23/2025.
  • Breastcancer.org. Types of Mastectomy (https://www.breastcancer.org/treatment/surgery/mastectomy/types). Last updated 8/30/2024. Accessed 11/23/2025.
  • Bryan AF, Castillo-Angeles M, Minami C, et al. Value of Ambulatory Modified Radical Mastectomy (https://pubmed.ncbi.nlm.nih.gov/37166742/)Ann Surg Oncol. 2023;30(8):4637-4643. Accessed 11/23/2025.
  • Susan G. Komen. Mastectomy – What You Need to Know (https://www.komen.org/breast-cancer/treatment/type/surgery/mastectomy/). Last updated 7/7/2025. Accessed 11/23/2025.
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