A simple mastectomy, also called a total mastectomy, is a surgical procedure that removes the entire breast to treat or prevent breast cancer. The surgery takes out all breast tissue, the skin overlying the breast, the nipple, the areola, and the thin lining over the main chest muscle. Unlike more extensive procedures, it leaves the chest muscles intact and does not remove most of the underarm lymph nodes.
What Gets Removed and What Stays
During a simple mastectomy, the surgeon makes an incision around the breast and removes the breast tissue, overlying skin, nipple, and areola. The lining of the pectoralis major (your main chest muscle) also comes out. The muscle itself stays in place, which is a key distinction from more aggressive surgeries.
In many cases, the surgeon will also remove a small number of lymph nodes from the armpit for what’s called a sentinel node biopsy. This checks whether cancer has started to spread beyond the breast. But a simple mastectomy does not involve clearing out all the underarm lymph nodes, which is what separates it from the next step up in surgical scope.
How It Differs From a Modified Radical Mastectomy
The main difference comes down to lymph nodes. A simple mastectomy removes the breast but leaves most underarm lymph nodes alone. A modified radical mastectomy removes the entire breast plus most of the axillary (underarm) lymph nodes. Both procedures remove the breast tissue, skin, nipple, and areola, so the difference isn’t about how much breast is taken but about how extensively the lymph system is addressed.
A modified radical mastectomy is typically chosen when cancer has spread or is strongly suspected to have spread to the lymph nodes. A simple mastectomy is more common when the cancer is contained within the breast or when the surgery is preventive.
When a Simple Mastectomy Is Recommended
Several situations point toward a simple mastectomy rather than breast-conserving surgery (lumpectomy). Cancer that appears in multiple areas of the same breast makes it difficult to remove with a smaller operation. A history of connective tissue disorders can make radiation therapy, which typically follows a lumpectomy, riskier. Inflammatory breast cancer rules out breast-conserving approaches entirely.
Simple mastectomy is also a common choice for ductal carcinoma in situ (DCIS), an early-stage condition where abnormal cells line the milk ducts but haven’t invaded surrounding tissue. And some people with a high genetic risk of breast cancer, such as those carrying BRCA gene mutations, choose a prophylactic (preventive) simple mastectomy on one or both sides.
Survival outcomes are equivalent whether someone has a mastectomy or breast-conserving surgery with radiation, as confirmed by multiple large clinical trials. The choice often comes down to the size and location of the cancer, personal risk factors, and individual preference.
Reconstruction: Timing and Options
Breast reconstruction can happen at the same time as the mastectomy (immediate reconstruction) or months to years later (delayed reconstruction). Both approaches are well established, and the right choice depends on whether additional treatments like radiation are planned and on personal preference. Some people find it easier to focus on cancer treatment first and consider reconstruction later, once they’ve recovered.
Radiation can complicate wound healing in a reconstructed breast, so the timing matters. With improvements in surgical and radiation techniques, immediate reconstruction with an implant is usually still possible even when radiation is expected. Reconstruction using your own tissue (autologous reconstruction) is generally reserved for after radiation is complete, because the transferred tissue can replace skin and fat that radiation has damaged.
Reconstruction falls into two broad categories:
- Implants: Saline or silicone implants placed beneath the chest muscle or skin. This is typically a shorter surgery with a faster initial recovery.
- Autologous tissue (flap procedures): Skin, fat, and sometimes muscle are moved from another part of your body to create a new breast shape. Common donor sites include the abdomen, back, inner thigh, and buttocks. These surgeries are more complex but create a breast that looks and feels more natural and changes with your body over time.
In some cases, particularly when tissue from the thigh or buttocks doesn’t provide enough volume on its own, surgeons combine a flap with an implant.
What Recovery Looks Like
After surgery, you’ll have one or more small drainage tubes coming from the incision site. These collect fluid that builds up as your body heals. At home, you’ll need to empty the drainage bulbs into the toilet when they fill halfway, typically two to four times a day, and record the amount and color of the fluid. Keeping the skin around the drain entry points clean and dry helps prevent infection.
Drains stay in until the fluid output drops below about 20 to 30 cubic centimeters per day (roughly two tablespoons) for two consecutive days. For most people, that means one to three weeks after surgery. If drains remain in place longer than three weeks, infection risk goes up, so your surgical team will monitor this closely. Drain removal happens in the surgeon’s office and is a quick procedure.
Gentle arm exercises can begin as soon as one to two days after surgery, starting with basic movements and gradually adding more each day. However, you should not raise your arm above shoulder height until your surgeon clears you, which is usually three to four weeks out. Around the four-week mark, many surgeons refer patients to a physical or occupational therapist who will create a personalized plan to restore full range of motion and rebuild strength.
Numbness and Nerve Pain
Losing sensation across the chest wall is one of the most common and often unexpected effects of mastectomy. The surgery cuts through small nerves in the breast and chest skin, which can cause numbness, a burning sensation, or extreme skin sensitivity in the chest, armpit, or inner arm. For many people, numbness in the chest area is permanent or only partially improves.
Some patients develop a condition called post-mastectomy pain syndrome, a chronic nerve pain that persists beyond three months after surgery. Nerves regenerate slowly, at roughly one millimeter per day, so recovery of sensation can take up to a year. Not everyone regains full feeling, but gradual improvement over many months is common. Treatment options for persistent nerve pain exist and are worth discussing with your care team if discomfort lingers.
Life After a Simple Mastectomy
The physical restrictions are relatively short-lived. Most people return to light daily activities within a few weeks, with a full return to exercise and heavier lifting happening over the following months as strength and range of motion return. The scar typically runs horizontally across the chest where the breast was, and it fades over time.
For those who don’t pursue reconstruction, prosthetic breast forms that fit inside a bra are widely available and come in a range of shapes, sizes, and materials. Many insurance plans cover both reconstruction and prosthetics. The adjustment is as much emotional as it is physical, and support groups and counseling specific to mastectomy recovery can be genuinely helpful during the transition.