Skip to content
My WebMD Sign In, Sign Up

Breast Cancer Health Center

Font Size

Modified Radical Mastectomy

When doctors treat breast cancer, their goal is to remove all of the cancer -- or as much of it as possible. Surgery is one of the mainstays of treatment, and today a procedure called modified radical mastectomy (MRM) has become a standard surgical treatment for early-stage breast cancers.

Modified radical mastectomy is especially helpful for early-stage breast cancer that has spread to the lymph nodes. Studies show that MRM is just as effective as radical mastectomy, but not nearly as disfiguring.  MRM spares one or both of the chest muscles, preventing an unsightly hollow in the chest that is common after a traditional radical mastectomy.

Recommended Related to Breast Cancer

My WebMD: Caring for a Spouse with Cancer

 In April 2002, when the doctor told us my wife, Chris, had breast cancer, the first two words out of my mouth were "Oh" and a four-letter word. I felt shock and disbelief -- that this kind of thing happens to other people, not to us. I had no idea how I would handle this -- do all the caregiving, plus make a living. Right away, my attitude was, "It's her job to get better, and it's my job to do everything else." But it still seemed impossible. As it turned out, Chris had stage 3 breast cancer and...

Read the My WebMD: Caring for a Spouse with Cancer article > >

What Is Modified Radical Mastectomy?

During a modified radical mastectomy, the surgeon removes the breast (including the skin, breast tissue, areola, and nipple) and most of the lymph nodes under the arm. The lining over the large muscle in the chest called the pectoralis major is also removed. However, this surgery spares the pectoralis major muscle itself.

MRM surgery tries to preserve enough healthy tissue and skin for a surgeon to perform breast reconstruction surgery in women who want to have it done.

What to Expect During an MRM

A modified radical mastectomy takes about two to four hours. The surgery might take longer if you have breast reconstruction surgery done immediately afterward.

While you are under general anesthesia, the surgeon will make a single incision across one side of the chest. The skin will be pulled back. Then the doctor will remove the entire breast tissue, the lining over the pectoralis major, as well as some of the lymph nodes under your arm.  Finally, the doctor will close the incision.

The goal is to remove the cancer while preserving as much of the skin and tissue as possible so that you can have breast reconstruction. The surgeon also will try to avoid damaging nearby blood vessels and nerves.

Although research has found modified radical mastectomy to be generally safe and effective, like all surgical procedures it can have risks, which include:

  • Bleeding
  • Infection
  • Swelling of the arm
  • Pockets of fluid forming underneath the incision (seromas)
  • Risks from general anesthesia

Some people experience numbness in the upper arm, which is caused by damage to small nerves in the area where the lymph nodes are removed. There is a good chance that you will regain most of the feeling in your arm over time.

The lymph nodes that are removed will be sent to a lab for examination to determine whether the cancer has spread.

After a Modified Radical Mastectomy

Once your surgery is complete, you will need to stay in the hospital for one or two nights. Thin plastic tubes will be placed in your breast area to drain off any fluid. These drains are attached to small suction devices. The drains will be removed about a week after your surgery. The hospital staff will show you how to care for the tubes until they are removed.

WebMD Medical Reference

Today on WebMD

Breast Cancer Overview
From self-exams and biopsies to reconstruction, we’ve got you covered.
Dealing with breast cancer
Get answers to your questions.
 
woman having mammogram
Experts don’t agree on all fronts, but you can be your own advocate.
woman undergoing breast cancer test
Many women worry. But the truth? Most abnormalities aren’t breast cancer.
 
Breast Cancer Treatments Improving
VIDEO
Resolved To Quit Smoking
SLIDESHOW
 
Woman getting mammogram
Article
Screening Tests for Women
SLIDESHOW
 
ovarian cancer overview slideshow
SLIDESHOW
serious woman
Article
 
what is your cancer risk
HEALTH CHECK
10 Ways to Revitalize Slideshow
SLIDESHOW