Is Top Surgery the Same as a Mastectomy? What Patients Should Know. in Beverly Hills

A total mastectomy removes all of the breast tissue. For a patient undergoing mastectomy for breast cancer, the priority is oncologic safety: removing the tissue that contains cancer, or tissue that carries significant risk, while achieving appropriate surgical margins. A simple mastectomy may be performed on one breast or both, and depending on the diagnosis and treatment plan, lymph node surgery is sometimes done at the same time.

There are several surgical approaches, including skin-sparing and nipple-sparing techniques. In a nipple-sparing mastectomy, the breast tissue is removed while the skin and nipple-areola complex are preserved, when that is appropriate for the patient's anatomy and medical circumstances. When the goal is cancer treatment or meaningful risk reduction, the surgical plan is built around removing as much breast tissue as possible while still honoring sound oncologic principles.

Top surgery is a broad term used to describe gender-affirming chest surgery. In its masculinizing form, the goal is to remove breast tissue and reshape the skin and chest to create a flatter, more masculine contour.

Unlike a mastectomy performed for cancer, the objective here isn't necessarily to remove every trace of breast tissue. Instead, the procedure is built around the patient's gender-affirming goals, their anatomy, and the chest appearance they're hoping to achieve. The surgeon isn't only removing tissue; the chest is being sculpted and contoured.

The pectoral muscle plays an important role in this process. A masculine chest has a different contour than a breast-free chest created simply by removing as much tissue as possible. For many patients, leaving a small amount of breast or soft tissue helps the surgeon create a smoother transition into the pectoral muscle, which produces a more natural-looking result. This means some breast tissue may intentionally remain after top surgery. The aim is the best possible chest shape, not an oncologic mastectomy. How much tissue is left behind varies from patient to patient, depending on anatomy, the amount of breast tissue present, skin quality, chest shape, and personal goals.

For some patients, though, removing all breast tissue matters a great deal, often because of a personal breast cancer risk or a simple preference for the most complete tissue removal possible. In those cases, a surgeon can perform a more complete mastectomy. Ultimately, how much tissue to remove during top surgery is an individualized decision that should be discussed thoroughly with the surgical team before surgery.

If breast tissue remains after top surgery, it's important to understand that the surgery doesn't necessarily eliminate the need for future breast cancer screening. There isn't a single screening recommendation that applies to everyone who has had gender-affirming chest surgery. Screening needs depend on how much tissue remains, the patient's age, personal and family history, genetic risk, and the specifics of the surgery that was performed. Patients should discuss their individual screening plan with a breast specialist or another clinician familiar with their surgical history.

Absolutely! A patient can choose a more complete removal of breast tissue if that's their preference and it fits their anatomy and surgical goals. For someone with a significant personal or family history of breast cancer, a cancer-predisposing genetic mutation, or simply a strong preference for the greatest possible reduction in residual tissue, an oncologically-sound mastectomy may be worth considering.

That said, this approach can change the conversation around chest contour and aesthetics, since the goal of an oncologic mastectomy is fundamentally different from the goal of masculinizing top surgery. Top surgery can be tailored to prioritize masculine chest contour, while a risk-reducing or cancer-related mastectomy is built around removing breast tissue according to oncologic principles. Patients deserve the chance to understand these tradeoffs clearly and decide what matters most to them.

A traditional simple mastectomy and masculinizing top surgery may both involve removing breast tissue, but they are built around different goals. A simple mastectomy is primarily a breast cancer or risk-reduction operation, focused on removing the appropriate tissue according to oncologic principles. Top surgery is a gender-affirming operation, focused on creating a flatter, masculine-appearing chest by removing and reshaping tissue around the pectoral muscle. For patients who prefer to have all breast tissue removed, a more complete, oncologically-sound mastectomy can be performed when appropriate. That decision should be made together with the surgical team, after weighing the tradeoffs between tissue removal, chest contour, cancer risk, and future screening.

At Bedford Breast Center, every surgical plan starts with the individual patient. Whether the goal is cancer treatment, cancer risk reduction, or gender-affirming chest surgery, understanding exactly what tissue will be removed, what may remain, and why is an essential part of making an informed decision.

1. Does having top surgery affect my future breast cancer risk? Top surgery removes a significant amount of breast tissue, which may reduce the amount of tissue that could develop cancer, but it is not performed as a cancer risk-reduction procedure and shouldn't be treated as equivalent to one. If cancer risk is a primary concern for you, that's worth discussing directly with your surgeon, since it may change the surgical approach.
2. Can I ask my surgeon to remove all of my breast tissue during top surgery? Yes. If a more complete removal is important to you, whether for personal preference or because of an elevated cancer risk, your surgeon can plan a more oncologically thorough approach. This may change some of the aesthetic and contouring choices, so it's a conversation worth having before surgery, not after.
3. Why would a surgeon intentionally leave some breast tissue behind during top surgery? Leaving a small amount of tissue can help create a smoother transition into the pectoral muscle, which often produces a more natural-looking masculine chest contour. How much tissue is left varies by patient and depends on anatomy, skin quality, and personal goals. It's a deliberate aesthetic choice, not an oversight.