A simple mastectomy, also called a total mastectomy, is the procedure that removes only the breast tissue without taking the underlying chest muscles or the full set of underarm lymph nodes. It is the most common type of mastectomy performed today. If you’re looking for a version that preserves even more, a nipple-sparing mastectomy goes a step further by removing the breast tissue while leaving the skin, nipple, and areola intact.
What a Simple Mastectomy Removes
A simple (total) mastectomy removes the entire breast. That includes the breast tissue itself, the overlying skin, the nipple and areola, and the thin lining that covers the main chest muscle. What it does not remove is the chest muscle underneath, the bulk of the underarm lymph nodes, or surrounding structures like nerves and blood vessels that supply the arm. This is the key distinction from more extensive surgeries.
In some cases, a surgeon will also perform a sentinel lymph node biopsy at the same time. This involves removing just one to three lymph nodes nearest the breast to check whether cancer has spread. It’s a targeted sampling, not a full clearing of the armpit. The sentinel node is successfully identified in about 98% of patients, and if those few nodes come back clear, no further lymph node surgery is needed.
How It Differs From More Extensive Mastectomies
A modified radical mastectomy removes the entire breast plus most of the underarm (axillary) lymph nodes. That additional lymph node removal is called an axillary lymph node dissection, and it typically clears around 15 or more nodes. It’s performed when cancer is known or strongly suspected to have reached the lymph nodes.
The practical difference matters most for recovery. Patients who undergo a full axillary lymph node dissection during mastectomy have a lymphedema incidence roughly four times higher than those who have only a sentinel node biopsy: about 20% compared to roughly 6%. Lymphedema causes chronic swelling in the arm on the surgical side and can be permanent, so avoiding unnecessary lymph node removal is a major goal of modern breast surgery.
A radical mastectomy, which removes the breast, all axillary lymph nodes, and the chest wall muscles, is rarely performed today. It was the standard approach for decades but has been largely replaced by less invasive options that offer comparable survival outcomes.
Nipple-Sparing and Skin-Sparing Options
If you’ve seen references to mastectomies that remove “only breast tissue,” you may be thinking of the nipple-sparing mastectomy. This procedure removes all the breast tissue from the inside while preserving the entire outer envelope: the skin, nipple, and areola all stay in place. It’s designed for patients who plan to have immediate breast reconstruction, since the preserved skin creates a natural-looking pocket for an implant or tissue flap.
A skin-sparing mastectomy is a middle ground. The breast tissue and the nipple-areola complex are removed, but most of the surrounding breast skin is preserved. Only a small amount of skin around the nipple is taken. This also facilitates reconstruction while removing a bit more tissue than the nipple-sparing version.
Not everyone is a candidate for these tissue-preserving approaches. Tumors that are close to the nipple or skin surface, or cancers involving the nipple itself, generally require a standard simple mastectomy so that no diseased tissue is left behind. Your surgeon determines eligibility based on tumor size, location, and imaging results.
When a Simple Mastectomy Is Recommended
A simple mastectomy is used in several distinct situations. For cancer treatment, it’s commonly chosen for early-stage invasive breast cancer, ductal carcinoma in situ (DCIS) that is widespread within the breast, or cases where a lumpectomy isn’t feasible due to tumor size relative to breast size.
It’s also the primary surgery for risk reduction. People who carry harmful mutations in genes like BRCA1 or BRCA2 sometimes choose bilateral prophylactic mastectomy, removing both breasts before cancer develops. This can be done as a total mastectomy or as a nipple-sparing mastectomy, depending on the individual’s anatomy and preferences. Other high-risk groups who may consider this include people with a history of chest radiation before age 30 and those diagnosed with certain precancerous conditions alongside a strong family history.
Some people diagnosed with cancer in one breast also choose to have the opposite breast removed at the same time, known as contralateral prophylactic mastectomy. This is generally recommended only for those with a genuinely elevated risk of developing a second cancer, not as a routine precaution.
What Recovery Looks Like
A simple mastectomy without reconstruction is typically an outpatient procedure or requires one night in the hospital. You’ll go home with one or two surgical drains, small tubes that collect fluid from the surgical site. These are usually removed within one to two weeks, once the fluid output drops below a certain level.
Most people can return to light daily activities within two to three weeks. Lifting anything heavier than about 10 pounds and vigorous upper-body movement are restricted for four to six weeks to allow the chest wall to heal. Driving is usually possible once you’re off prescription pain medication and can comfortably turn the steering wheel, which for many people is around 10 to 14 days.
If reconstruction is done at the same time, recovery is longer and depends on the reconstruction method. Implant-based reconstruction adds relatively little extra downtime, while procedures that move tissue from the abdomen or back involve a more involved recovery of six to eight weeks or more. The mastectomy itself, though, heals on the same general timeline regardless of whether reconstruction follows.