(61) 3035-8200

Address: Quadra 905, Asa Sul, Brasília DF
Site: www.oncotek.com.br


Founded on the pillars of the humanized look and vision of the patient inserted in society, the Oncotek clinic takes this essence in all its relationships. This is the result of the study and experience of its creator, the oncologist doctor Eduardo Johnson Buarque. For several years working in Oncology, he understands the special care that the patient facing this complex disease requires.

Our oncology

Located on Quadra 905 of Asa Sul neighborhood, Oncotek works from a multi-dimensional approach perspective. More than offering conventional medical treatment for the disease, Oncotek treats the person, bringing back the command of their life, showing ways and determining protocols that ensure dignity and humanization throughout the treatment.

Dr. Eduardo Johnson

Founder of the Oncotek Clinic, he has worked for over 30 years in the clinical, surgical and cancer research fields. As a surgeon, he came across several cases of tumors, where the only alternative for the patients was the extraction of the affected organs and regions, with a high recurrence rate. Therefore, he went to the United States to do research and bring to Brazil alternatives other than surgical ones, becoming also a specialist in Clinical Oncology. Dr. Eduardo has brought together all the areas of knowledge he studied and has become a specialist in the global treatment of cancer patients, offering a real possibility of healing and prolonging family life. He held leadership positions at the Oncology Hospital in Rio de Janeiro. In Brasilia, he founded the Oncological Research and Treatment Center of the University Hospital of Brasilia (HUB) and has been leading Oncotek for almost 10 years.


  • Medical Sciences– Universidade do Estado do Rio de Janeiro (UERJ)
  • Undergraduate in Biological Sciences: Faculty of Medical Sciences – UERJ
  • Specialization in Oncology: Residência Médica no Instituto Nacional de Câncer (Medical Residency at the National Cancer Institute).
  • University Of California Los Angeles (UCLA)
  • Audrey Meyer Mars International Fellowship in Clinical Oncology: American Cancer Society
  • Gastrointestinal Stromal Tumors Treatment (GIST), National Cancer Institute (NCI)
  • Expertise in clinical protocols, phase II, III and IV for GIST, head and neck cancer, acute myeloid leukemia, breast cancer, advanced cancer bone metastasis, and expanded access to colorectal and lung cancer
  • International Union Against Cancer (UICC)
  • Cancer Research Fellowship UCLA – School of Medicine
  • Member of American Society of Clinical Oncology (ASCO)
  • Member of European Society of Medical Oncology (ESMO)
  • Fellow of UICC
  • American Cancer Society – AMM15
  • Specialist in Clinical Oncology at CRM-DF
  • Founder and head of the oncologic treatment center of the University Hospital of Brasilia


Know the treatments

After diagnosis, the oncologist assesses which approach is best for each patient. They can be surgery, chemotherapy, radiation therapy, hormone therapy and immunotherapy. But it is not uncommon to combine more than one treatment to increase the patient’s chances of response. All this will be analyzed during consultations and talked to the patient so that there is no doubt.


It is the most popularly known. The concept is simple, the treatment aims to kill the cancer-forming cells. The drugs used, the chemotherapy drugs, are applied and carried to all parts of the body through the bloodstream. Chemotherapy acts mainly and most intensely on malignant cells, but it can also affect healthy cells, which causes various side effects.

When this happens, symptoms are controlled with specific medications. The Doctor and the nurse will answer any questions during consultations and application sessions. If something deviates from the expected, it is important to inform the team immediately.

The sessions vary for each patient and can be weekly or even every 28 days. Chemotherapy is applied to the vein in most cases, but may also be oral, subcutaneous, topical or spinal canal (spinal canal).


Performed differently from chemotherapy, but for similar purposes, radiotherapy uses radiation only in the region of the body where the tumor is, thus affecting diseased cells. As a targeted application, it prevents many healthy body cells from being hit.

The radiation is emitted externally by a conventional x-ray generator, with optimal frequency and intensity for each case, ranging from 1 to 42 sessions. There is no pain at the time of application and as it is a form of energy, it is not possible to see or feel anything either. Reactions to this treatment tend to be less aggressive than those of chemotherapy and occur only in the organ where it was applied.

Hormone therapy

One of the ways in which a tumor can grow disorderly is from hormonal stimulation. When this happens, hormone therapy is used to support cancer treatment.

From pills or subcutaneous injections, the action of the hormone that is stimulating malignant cells is blocked. It can be used to maximize the results of other treatments (surgery, radiotherapy, and chemotherapy), to prevent relapse, and to curb disease progression when healing is no longer possible.

By inhibiting the action of hormones, the side effects of this technique are symptoms similar to those found in menopause, vaginal bleeding, thrombosis, loss of bone and muscle mass and weight gain. Because of this, treatment use will depend on tumor-related factors, patient age and risk of reactions.


This technique is part of the new generation of cancer treatments. Unlike chemotherapy and radiotherapy, which fight the tumor through the direct death of its cells by medication, immunotherapy uses the patient’s immune system for this. Immunotherapeutic drugs prevent malignant cells from being invisible to the body’s defense mechanism and allow the body itself to attack cancer.

The applications are made only intravenously or subcutaneously, with intervals ranging from two to three weeks. Side effects are usually mild, less frequent and easily treatable.



Oncotek is committed to the health and quality of life of each of our patients. And for this it is essential to have a multidisciplinary team of experts.

The clinical staff is structured in an interdependent manner, encompassing the patient in a vision beyond the disease, paying attention also to the person and the various dimensions of his life. This way, each professional works in their area of expertise and supports Oncology.

With this way of caring for the patient, the main avenues for efficient and humanized treatment are guaranteed, whatever the disease: early and accurate diagnosis and complete follow-up throughout the process.

The team is comprised of two more specialties in direct approach to cancer patients, Nutrition and Psychology. The guidance of these professionals provides comprehensive care, assists in coping with the disease, mitigates the side effects of treatment and offers support to the family.

The other specialties intersect cancer treatment in two ways, being part of the protocol of non-hospitalization and addressing any problems that arise during cancer treatment.


Know our specialties:


Oncology is Oncotek’s main area of expertise. This is the specialty that coordinates all the others and each plays its role with the same goal: to provide the most efficient cancer treatment possible in order to preserve the quality of life.

Taking care of the cancer patient requires a broad view to understand this cancer in all its complexity, and this is what an oncologist offers. The in-depth analysis of each patient and its various dimensions allows this professional to design an individualized treatment plan, integrating the best therapies and professionals into a specific protocol.

Throughout the process, a multidisciplinary team accompanies the patient in complete agreement with the oncologist, in order to apply non-hospitalization protocols and integrative therapies, aiming at quality of life, increased response to treatments and the real chance of cure.


Dr. Eduardo Johnson

It is one of the pioneers in Oncology in Brasilia. Graduated in Medicine and Biological Sciences and specialized in Clinical Oncology.



The nutritional intervention in cancer patients, in addition to helping to reduce the side effects of treatment, known as toxicity, also helps in enhancing the results of the therapies employed.

The oncologic nutritionist works individually with the patient, but also relates to the family in order to stabilize the nutritional status of the patient, strengthen their immune system and reduce the impact of the disease on the body.

All the time, the oncologic nutritionist seeks to bring an understanding of why avoid certain foods and the need to insert in the diet of others, aiming to empower and understand the patient’s profile. In this way, the process of food readaptation becomes closer to your reality and preferences, so as not to cause an uncomfortable break in your routine.

The follow-up with the nutritionist should be started along with cancer treatment, in order to answer the first doubts about eating habits that should be adopted by the patient, as needed. From that moment on, the first nutritional assessment and monitoring will begin to maintain or adjust the nutritional care plan.



The psycho-oncology professional treats the emotional health of cancer patients and their families, aiming to assist them in coping with the disease.

During treatment aspects such as self-esteem, sexuality, values and beliefs can be shaken, and for these reasons, psychological care provides the patient with the tools necessary for a better understanding of his current state. In time, the psychologist seeks with the patient to reframe the process of treatment against the disease and to empower it, in order to make the journey against cancer lighter.

It is recommended that the patient begins psychological counseling immediately after diagnosis and its duration will be defined according to the need identified by the psychologist.

Here at Oncotek, we believe that the psychological accompaniment of the patient and his family, both in the treatment and post-treatment phase, is fundamental for the better coping of the lived moment and understanding of the challenging experience that is cancer.

Here at Oncotek, we believe that the psychological accompaniment of the patient and his family, both in the treatment and post-treatment phase, is fundamental for the better coping of the lived moment and understanding of the challenging experience that is cancer.


Common questions

Does cancer have a cure?

Currently, we can say that more than half of cancers are curable. There are some types that are more treatable than others, but to increase the chance of success, the first step is early diagnosis.

Is every tumor a cancer?

A tumor is not necessarily cancer, there are benign and malignant ones. Benigns are also a set of abnormally reproducing cells, but the growth rate is slower and their characteristics are similar to those of the original tissue cells. In addition, the benign tumor offers no risk and has no ability to spread to other regions of the body. Already malignant are formed by an overgrowth of cells and can move to other organs of the body.

Can the disease come back?

After the treatment ends, the patients enter in remission, which is when the conventional imaging no longer detects signs of cancer cell activity. But some may fall asleep for a period and then reproduce in a disorderly fashion, leading to new cancer. After five years in remission, the chances of relapse generally decrease progressively. With the end of treatment and depending on the chances of the disease returning, routine examinations are performed to monitor the patient in remission.

What are the most common types?

In Brazil, the most common type of cancer is non-melanoma skin cancer. Generally, these tumors have local damage and rarely spread. In women, the most common are still breast, colon and rectal and cervical cancer, in order of incidence. Men are more affected by prostate, lung, colon and rectal cancer.

What are screening exams? Who should do?

These tests are indicated for patients with no symptoms to identify cancer at its earliest stage, when it is easily curable. The best known are mammograms for breast cancer; rectal touch and PSA for prostate cancer; Pap smear for cervical cancer; colonoscopy for colon and rectal cancer; and chest tomography for smokers. Each test has its specific indication and must be requested by a doctor.

If a close relative has cancer, more likely to have the disease?

Yes. Depending on the type, it may be associated with a genetic syndrome – predictable by examination – or not. Ideally, look for a doctor who will study the case and guide screening or even genetic testing for each specific case.

Diagnosed With Cancer, How Should I Proceed?

The next step is to speak to an oncologist to evaluate your case and seek the best form of treatment. Make an appointment with one of our specialists at 61 3035-8200 or 61 99873-0700.

Do inflamed breast ducts present any risk of developing breast cancer?

Breast inflammation does not become cancer, but care should be taken not to overlook cancer in an inflamed breast, as various benign diseases and breast cancer can coexist. It is common for patients who have been treating mastitis (benign inflammatory disease) for a long time, and, coincidentally, a small breast tumor is discovered, unrelated to one problem. A slightly rarer and more specific disease is the inflammatory breast tumor. In this case, the inflammation is directly due to the tumor infiltration. If the inflammation and pain are constant, a thorough investigation with the doctor is ideal.


Fundada sobre os pilares do olhar humanizado e visão do paciente inserido na sociedade, a clínica Oncotek leva essa essência em todas suas relações. Isso é fruto do estudo e experiência de seu criador, o médico oncologista Dr. Eduardo Johnson Buarque. Há vários anos atuando na Oncologia, ele entende o cuidado especial que o paciente que está enfrentando esta doença complexa exige.


Nossa Oncologia

Localizada na quadra 905 da Asa Sul, a Oncotek trabalha na perspectiva de abordagem em várias dimensões. Mais do que oferecer tratamento médico convencional para a doença, a Oncotek trata a pessoa, trazendo de volta o comando da sua vida, mostrando caminhos e determinando protocolos que garantam dignidade e humanização durante todo o tratamento.