ImmunotherapyInstitute

— Digestive System

Colorectal Cancer Treatment in Mexico

Personalized protocols focused on digestive health, immune support, and tumor control.

Colorectal cancer is one of the most common types of cancer, affecting the colon or rectum and often developing gradually over time. At Immunotherapy Institute, we offer a comprehensive, integrative approach that combines advanced medical treatments with immune system support—designed to help patients manage the disease while maintaining quality of life.

What Is Colorectal Cancer?

Colorectal cancer begins in the large intestine, which includes the colon and rectum. Most cases develop from abnormal growths called polyps that can become cancerous over time.

Because this type of cancer can progress without clear symptoms in its early stages, timely evaluation and personalized care are essential for improving outcomes.

Symptoms of Colorectal Cancer

Symptoms can vary depending on the stage and location of the tumor. Common signs may include:

  • Changes in bowel habits, such as diarrhea or constipation
  • Rectal bleeding or blood in the stool
  • Abdominal discomfort or cramping
  • Unexplained fatigue or weakness

Diagnosis and Conventional Treatment

Diagnosis typically involves procedures such as colonoscopy and biopsy to confirm the presence of cancer and determine its stage. Imaging studies may also be used to evaluate the extent of the disease.

Treatment often includes surgery to remove the tumor, sometimes combined with chemotherapy or radiation therapy depending on the stage and location of the cancer.

An Integrative Approach to Colorectal Cancer Treatment

At Immunotherapy Institute, we complement conventional treatments with therapies designed to support the immune system and improve the body’s ability to respond to treatment. Our approach focuses not only on controlling tumor growth, but also on strengthening overall health and resilience.

Treatment plans may include advanced immunotherapy, metabolic and nutritional support, and therapies aimed at enhancing treatment effectiveness while minimizing side effects. Each program is personalized based on the patient’s condition, diagnosis, and medical history.

Supporting the Body Throughout Treatment

Maintaining strength and stability during treatment is essential. Our programs include targeted nutrition, immune support, and carefully selected therapies designed to help patients better tolerate treatment and maintain their quality of life.

By addressing inflammation and supporting cellular health, we aim to create an internal environment that supports recovery and long-term wellness.

Personalized Care for Every Patient

Every case of colorectal cancer is different. That’s why we take the time to understand your full medical history, lifestyle, and goals before designing a treatment plan. Our multidisciplinary team works closely with you throughout the process, adapting your care as needed to support both immediate progress and long-term outcomes.

Explore Your Treatment Options

If you or a loved one has been diagnosed with colorectal cancer, our team is here to help you understand your options and take the next step with confidence.

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 colorectal cancer would look like before you commit to anything.

— Common integrative treatments

How we approach Colorectal Cancer

Colostomy+

Sometimes, a person with rectal cancer may need to have a colostomy. This is a surgical opening, or stoma, through which the colon is connected to the abdominal surface to provide a pathway for waste to exit the body. This waste is collected in a pouch worn by the patient. Sometimes, the colostomy is only temporary to allow the rectum to heal, but it may be permanent.

Radiation+

For rectal cancer, radiation therapy may be used before surgery, called neoadjuvant therapy, to shrink the tumor so that it is easier to remove. It may also be used after surgery to destroy any remaining cancer cells, chemotherapy is often given at the same time as radiation therapy, called chemoradiation therapy, to increase the effectiveness of the radiation therapy.

Systemic Therapy+

Systemic therapy is the use of medication to destroy cancer cells. This type of medication is given through the bloodstream to reach cancer cells throughout the body. Systemic therapies are generally prescribed by a medical oncologist common way to give systemic therapies include an intravenous (IV) tube placed into a vein using a needle or in a pill or capsule that is swallowed (orally).

The types of systemic therapies used for colorectal cancer include:

  • Chemotherapy
  • Targeted therapy
Immunotherapy / Cellular therapy+

As populations of useful bacteria decline over time, bowel-specific immunity and general immune system function deteriorate. The immune system’s overall ability to fight infection and cancer wanes, while inappropriate immune responses, including excessive inflammation, increase. CT can both boost appropriate infection- and cancer-fighting immune functions, and also help to suppress the inflammatory response when it gets out of control.

Autologous cancer vaccines have been studied extensively, with the most encouraging results noted in randomized, controlled clinical trials including more than 1,300 colorectal cancer patients in which tumor vaccines were given after surgery. These trials reported reduced recurrence rates and improved survival.

Hyperthermia+

Hyperthermia involves the use of heat to directly treat a tumor or increase the vulnerability of cancer cells to other forms of treatment, such as immunotherapy, vitamin C, chemotherapy or radiotherapy.

On one study colon adenocarcinoma cells demonstrated a promising decrease in cell viability after treatment with the low dose chemotherapy and heat.
Another study confirmed a potent anti-tumor efficacy caused combined thermo-chemotherapy.

Ozone/ Oxygen therapies+

Ozone therapy is an effective medical treatment for different diseases like mucositis, psoriasis, acute pain, neurovascular diseases, and cancer.

Studies have shown that ozone could be useful in colon cancer management in combination with nutraceuticals or LDQT w/ 5-fluorouracil and cisplatin with significant inhibition of cytokines having a central role in colon cancer cell survival and chemoresistance.

Related reading

Questions? We've got answers.

Do you treat stage 4 colon cancer?+

Yes. Many of our patients have stage 4 colon or rectal cancer that has spread to the liver, lungs or abdomen. We build personalized plans with immunotherapy, targeted therapy and supportive care, aimed at controlling the disease and protecting quality of life.

Does immunotherapy work for colorectal cancer?+

It depends on the tumor. Cancers with MSI-high or mismatch repair deficiency (dMMR) often respond well to immunotherapy. Other colorectal cancers may need a combined approach. We review your pathology and tumor testing to decide what fits your case.

Which tests should I bring for my case review?+

Please send your pathology report, recent CT or PET scans, CEA levels and any tumor testing, such as KRAS, NRAS, BRAF and MSI status. These results help our oncologist recommend the most precise treatment.

Can I be treated in Mexico after chemotherapy stopped working?+

Yes. Many patients come to us after standard chemotherapy. Our chemotherapy preconditioning program and immune-based therapies are designed for patients who need new options, and our team will tell you honestly what results are realistic.

How much does colon cancer treatment cost in Mexico?+

Cost depends on your stage and protocol. Our programs cost an average of 70% less than what patients typically pay out of pocket or in copays for similar care in the US. After your free case review, we give you a written quote with everything included.

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.

— Diseases we treat

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