ImmunotherapyInstitute

— Women's cancers

Breast Cancer Treatment in Mexico

Personalized therapies designed to target breast cancer while supporting hormonal balance and immune function.

Understanding, Diagnosing, and Treating Breast Cancer Holistically

About Breast Cancer

Breast cancer is the most common cancer in American women, except for skin cancer. The American Cancer Society estimates that about 321,910 women in the US will be diagnosed with invasive breast cancer in 2026.

Most breast cancers begin in the cells lining the ducts or lobules of the breast, and ductal tumors are the more common of the two. These cells mutate, then divide uncontrollably or survive longer than they should, eventually forming a tumor. Family history matters: having a mother, sister or daughter with breast cancer roughly doubles a woman's risk.

Signs and Symptoms

The most common sign is a new lump in the breast or armpit, often in the upper outer part of the breast. Other signs include swelling, tenderness, changes in the skin or nipple, and nipple discharge. Many women have no symptoms at all, and their cancer is found on a routine mammogram.

Types of Breast Cancer

Breast cancer is classified in several ways, and each one shapes treatment:

  • By where it starts: Ductal, lobular, and less common types such as metaplastic.
  • By receptor status: Hormone receptor-positive, HER2-positive and triple-negative. Receptor status is one of the most important factors in choosing treatment.
  • Inflammatory breast cancer: A rare, aggressive form that causes redness and swelling of the breast, often without a distinct lump.

Breast Cancer Diagnosis

Diagnosing breast cancer usually involves several steps:

  • Physical exam: A thorough examination of the breasts and lymph nodes to check for abnormalities.
  • Mammography: Low-dose X-ray imaging that can detect tumors and calcifications before they can be felt.
  • Ultrasound: Uses sound waves to show whether a lump is a solid mass or a fluid-filled cyst.
  • MRI: Used in specific situations, such as high-risk screening or measuring the extent of disease. It doesn't use radiation.
  • Biopsy: The only way to confirm breast cancer. It also identifies the tumor's type and receptor status, which guide treatment.

Targeted Therapy Based on Your Tumor's Biology

Breast cancer is one of the cancers where targeted therapy matters most. ITI has access to the full range of targeted therapies used in breast cancer, and our oncologist selects them case by case based on your pathology:

  • HER2-positive: HER2-targeted antibodies that block the signals driving tumor growth.
  • Triple-negative: Checkpoint inhibitors that help the immune system recognize and attack cancer cells.
  • Hormone receptor-positive: Hormone therapy and CDK4/6 inhibitors.

These are combined with our core autologous immunotherapy and integrative support to build one personalized plan.

Integrative Medicine for Breast Cancer

We use integrative interventions to strengthen the body's ability to fight breast cancer and to manage the side effects of conventional treatment. These include personalized nutrition, supplementation and therapies such as:

These therapies support and enhance the effects of primary cancer treatment, helping prevent cancer recurrence and increase survival rates.

Common Integrative Treatments

  • Immunotherapy: Strengthens the body's natural ability to detect and eliminate cancer cells. This includes autologous cell therapy made from your own immune cells and pharmacological immunotherapy, which uses drugs to help the immune system attack cancer more effectively.
  • Hyperthermia: Uses heat to make cancer cells more vulnerable to other treatments such as immunotherapy, vitamin C, chemotherapy and radiation.
  • Glutathione: A key antioxidant that helps protect healthy cells from damage during treatment and supports the removal of toxins.
  • Selenium: An essential mineral that supports a healthy immune system. It has been studied for possible protective effects against certain cancers, including breast cancer, by reducing oxidative stress and inflammation.
  • Nutrition: A customized diet plan that supports the immune system and meets each patient's current and long-term nutritional needs.
  • Vitamins and supplements: Including vitamin C, which some studies have associated with better outcomes in breast cancer patients.

Our goal is to give every patient a clear path forward and the best possible chance at a healthier future.

Breast Cancer Patient Stories

Each story describes one person's experience; individual results vary.

Treatment takes place at our cancer treatment center in Tijuana, Mexico, about 20 minutes from the San Diego border. Our team coordinates your pickup in San Diego, your lodging and your schedule, and a free case review tells you what a treatment plan for breast cancer would look like before you commit to anything.

— Common integrative treatments

How we approach Breast Cancer

Immunotherapy+

The goal of cancer immunotherapy is to improve the body's natural ability to find and destroy cancer cells. Our approach combines cell therapy and pharmacological immunotherapy with nutritional support, endocrine measures and supplements.

Heckel Hyperthermia+

Heckel whole-body hyperthermia uses infrared heat to gently raise your core body temperature. The heat makes cancer cells more vulnerable to other treatments such as immunotherapy, vitamin C, chemotherapy and radiation. No sedation is needed.

In patients with superficial breast cancer and chest wall recurrence, adding hyperthermia to radiation improved local tumor control and reduced recurrence.

Glutathione+

Glutathione is the most important antioxidant your body produces and a master detoxifier for every cell. It helps protect healthy cells from the damage caused by free radicals and peroxides, which is especially important during cancer treatment, and it plays a central role in removing and detoxifying carcinogens.

Personalized Nutrition+

A typical diet built on animal products, refined carbohydrates and processed vegetable oils can promote inflammation in the body. Pro-inflammatory diets have been associated with a higher risk of breast cancer and a higher risk of dying from it.

We create a custom diet for each patient to support the immune system and meet their current and long-term nutritional needs.

Related reading

Questions? We've got answers.

Is immunotherapy effective for breast cancer?+

Immunotherapy can help some patients, particularly those with triple-negative or advanced breast cancer. Its value depends on your tumor's biology, including hormone receptor and HER2 status. We review your pathology to decide if immune-based treatment should be part of your plan.

Can you treat metastatic (stage 4) breast cancer?+

Yes. Many of our patients come to us with metastatic breast cancer after standard treatment. Our goal is to control the disease and protect quality of life with a personalized plan that combines immunotherapy, targeted therapy and supportive care.

Do I need a biopsy or genetic testing before treatment?+

We need your pathology report, including ER, PR and HER2 status. Genetic and tumor testing, when available, helps us choose more precise treatments. If you are missing key tests, we will tell you which ones and help arrange them.

Can I combine treatment in Mexico with my oncologist at home?+

Yes. Many patients keep their home oncologist. We share records, explain every therapy we use and coordinate follow-up, so your care stays connected after you return home.

How long will I need to stay in Tijuana?+

It depends on your protocol. Most programs require a stay of a few weeks, followed by our follow-up program for up to three years. We give you a clear timeline during your free case review.

How do you handle complications or side effects?+

Patients are monitored daily during treatment. Side effects are tracked, documented and addressed in real time, sometimes with medication adjustments, sometimes with supportive therapy, and occasionally by pausing a treatment. The treating physician reviews the patient's status every day the patient is on-site.

Can I continue treatments I'm already on at home?+

Usually yes, but it depends on the specific medication and how it interacts with our protocol. Bring a complete medication list to the consultation. We coordinate with your home physician where possible.

Will my treatment plan change while I'm here?+

Sometimes. Blood work, imaging and response markers are checked during your stay, and the protocol is adjusted if the data suggests it should be. Any meaningful change is reviewed with you before it's implemented.

How is my treatment plan decided?+

After we receive your medical records, imaging and pathology, your case is reviewed by the medical board. They draft a proposed protocol: which therapies, in what sequence, over how many days. You then have a consultation with the treating physician to review it, ask questions and adjust before anything begins.

Do you offer CAR-T therapy?+

Yes, we offer CAR-T therapy in addition to our broader autologous immunotherapy program. Both are built on the same core principle: collecting the patient's own immune cells, engineering or activating them to better recognize cancer, and reinfusing them to do the work. Which approach fits your case, and how it's delivered, is reviewed during the medical consultation.

What supportive therapies do you offer?+

IV vitamin C, ozone therapy, hyperbaric oxygen, peptide therapy, IV nutrition, metabolic support, lymphatic therapy and others, selected based on the patient's case, not applied as a fixed menu. These are supportive, not curative. They're used to help the body tolerate and respond to the core treatment.

Do you use radiation?+

Radiation is not delivered on-site. When radiation is part of the recommended plan, we coordinate with established radiation oncology centers and incorporate it into the broader protocol.

Do you use chemotherapy?+

We do, when it's the right tool for a given case, and we say so clearly. For some cancers, metronomic chemotherapy combined with immunotherapy is more effective than immunotherapy alone. We don't reject chemo as a category; we use it strategically.

Do you only treat late-stage or terminal patients?+

No. We see patients at every stage: newly diagnosed, in active treatment elsewhere, in remission and looking to lower recurrence risk, and patients who have exhausted conventional options. The protocol is adjusted to the situation.

How does diet affect my immune system?+

What you eat affects how well your immune system works. Highly processed foods, added sugars and certain fats can drive chronic inflammation, while a diet built on whole foods, vegetables and quality protein gives your body what it needs to repair tissue and fight disease. During cancer treatment, good nutrition also helps you maintain strength and tolerate therapy. That's why every patient's meals are planned by our clinical nutritionist.

Why are supplements part of the Institute nutritional plan?+

Supplements are an important part of your nutrition plan. We use a specialized line of supplements chosen for each patient. Our medical team considers your medical history, lab work, specific medical tests, genetics, physical condition, lifestyle, age, sex and type of disease.

Your supplements are reviewed and adjusted over time as your body responds and finds the balance it needs.

What are the characteristics of the Institute nutrition plan?+

Every plan is crafted for the individual patient. Our nutrition plan is:

  • Free of chemicals and preservatives
  • Made with organic fruits and vegetables
  • Made with hormone-free meat
  • Paired with personalized supplements
  • Made with metal and mercury free fish
  • Hypoallergenic
  • Gluten and dairy free to promote immune tolerance
  • Alkaline-focused, built around vegetables, fruits and whole foods
How do you create my nutrition plan?+

Your personalized nutrition plan is developed, reviewed and refined by our medical team together with our clinical nutritionist, kitchen staff and functionally trained chefs.

They take into account your needs during a stressful time, any nutritional deficiencies, the foods your body needs most, your allergies, and your personal preferences in taste and presentation.

What is the difference between metronomic chemotherapy and conventional chemotherapy?+

Conventional chemotherapy is given at the highest dose the body can tolerate, followed by a recovery break. Metronomic chemotherapy uses smaller doses given more frequently on a steady schedule.

Like any chemotherapy, metronomic chemo is systemic: it travels through the whole body. But this dosing approach causes fewer side effects than conventional schedules, and it's used to support the immune response rather than suppress it, which is why it pairs well with immunotherapy.

What kind of hyperthermia do you offer?+

We use Heckel whole-body hyperthermia, which raises your core body temperature using infrared heat. No sedation is needed, and you stay awake and alert throughout the session.

Hyperthermia is a well-established therapy, studied for decades and used in cancer centers around the world. Clinical trials have shown that combining hyperthermia with chemotherapy or radiation can improve results, and it also enhances the effect of immunotherapy.

Hyperthermia also supports the body's elimination process, which helps reduce the side effects of other treatments. Many patients say they feel better within the first few sessions.

Sessions typically last 2 to 4 hours. Hyperthermia is generally well tolerated. Side effects are usually mild and are reviewed with you before treatment.

What is the difference between the immunotherapy offered through your program and what my doctors are recommending at home?+

There are two main types of immunotherapy: pharmacological and autologous. We offer both, and we have seen great success with autologous immunotherapy.

In autologous cellular immunotherapy, we collect your immune cells, culture them, and infuse them back into your body. During that process, the cells are activated and trained to target and attack cancer cells.

Autologous cellular immunotherapy uses specific types of cells, mainly dendritic cells, NK cells and T lymphocytes. These cells act against cancer cells and recharge the immune system. When NK and T cells find a tumor cell, they attach to its membrane and release toxins that kill it, then move on to the next target.

Every case is different, which is why it's so important to review your specific situation. To find out if this therapy is right for you, call us or request a free case review.

What are the side effects of cancer treatment?+

Our program is designed to reduce side effects. Alongside your core treatment, we use supportive therapies that help your body tolerate treatment and recover, and you're monitored daily so any side effect is addressed right away.

Patients who have previously had chemotherapy receive a chemo-preconditioning program that helps reduce lingering effects such as nausea, fatigue, toxicity and anemia, so the body is in the best possible condition for treatment.

What kind of outcomes can patients expect?+

Every case is different, and no clinic can promise a cure. What we can say is that many of our patients achieve meaningful control of their disease, and some reach remission (no evidence of disease), while maintaining or improving quality of life. Outcomes depend on cancer type, stage and individual factors, and are never guaranteed. The best way to understand your specific situation is a case review with our physicians.

Can I undergo treatment at the Institute if I've had chemotherapy?+

Yes. Many of our patients are still on chemotherapy or have had it in the past, and many of our most successful cases had chemo before coming to us. Our treatments don't interfere with being on chemo the way many other treatments do. Our preconditioning program helps eliminate the toxic effects of previous chemotherapy and get the body into optimal condition for treatment.

Can the Institute treat stage IV cancer?+

Yes. Most of our patients come to us with stage IV disease. Each patient's outcome depends on their current health, medical history, eating habits and overall lifestyle, and our studies have shown that many of our cancer patients have reported benefit from our treatments.

For stage IV patients, time is of the essence. The sooner we review your case, the more options we're likely to have.

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