Dr. Ibrahim Tek

Dr. Ibrahim Tek

Cancer Specialist - Medical Oncologist

  Medicana Ankara International Hospital, Ankara, Turkey

  13 Years of experience


Qualification and Experience

Dr. Ibrahim Tek is one of the well-known oncologists in Ankara. He has more than 20 years of clinical experienced. Dr. Tek is extensively qualified and had undergone various trainings. He is currently holding various positions at Medicana International Hospital, Ankara such as Founder of Medical Oncology Department Associate Professor, Vice Chief of Bone Marrow Transplantation Unit, and Department of Medical Oncology, Chief of Medical Oncology. During his long career, he has also been associated with various hospitals such as Ankara University School of Medicine during Residency program, ?bn-i Sina Hospital as Emergency Department Internal Medicine Specialist, and Mehmet Ayd?n County Hospital, Hematology-Oncology Centre, Samsun. Dr. Tek completed his Graduate Education from Ankara University School of Medicine in the year 1996. Later, in 2001, he undergone post-graduation residency program at Ankara University School of Medicine. In the year 2003, he completed his Ph.D. from Health Science Institute Hemapherasis PhD Program, Ankara University. He was also awarded fellowship by Ankara University School of Medicine in Medical Oncology in the year 2003 and completed his fellowship in 2005.

Contribution to Medical Science

Dr. Ibrahim Tek manages various types of cancer with high success rate. He has special interest in treating and managing Lymphoma, Colon Cancer, Lung Cancer, and Breast Cancer. He is also an expert in performing stem cell transplantation which is a treatment option in various cancer diseases. His area of service includes treating and managing multiple myeloma, cancer complications during pregnancy, gastric cancer, Colo-rectal cancer, esophageal cancer, and various other cancers. Research publications of Dr. Tek related to various types of malignancies and stem cell transplantation have been published in various national and International journals. Dr. Tek is also an esteemed member of various organizations such as Association of Internal Medicine Specialists, Turkish Oncology Group Association, Turkish Hematology Association, Hemapheresis Association, Medical Oncology Association, and Academic Geriatrics Association.

Past Experience

  • Medicana International Hospital, Ankara Founder of Medical Oncology Department Associate Professor (2008 – present)
  • Medicana International Hospital, Ankara Vice chief of Bone Marrow Transplantation Unit (2012- 2014- 2016 – present)
  • Professor of Medical Oncology, Chief of Medical Oncology Department Medicana International Hospital, Ankara (2016- present)


  • Ankara University School of Medicine (1990-1996)
  • Ankara University School of Medicine, Internal Medicine Residency Program (1996-2001)
  • Health Science Institute Hemapherasis PhD Program, Ankara University (2001-2003)
  • Ankara University School of Medicine, Medical Oncology Fellowship Program (2003-2005)
  • Endoscopic Evaluation of Acute Intestinal Graft-versus-Host Disease After Allogeneic Hematopoietic Cell Transplantation.
  • Influence of febrile neutropenia period on plasma viscosity at malignancy.
  • IgA lambda oligoclonal gammopathy in multiple myeloma.
  • Lung Cancer Metastasis Mimicking Gluteal Abscess.
  • Blood viscosity in patients with diffuse large B cell non-hodgkin's lymphoma.

Chemotherapy is a category of standardized drug administration of various types for the treatment of cancer. With a curative intent, some combinations of drugs are administered to a patient to prolong their life and also to bring about a reduction in the symptoms shown by the patient. Chemotherapy treatment is considered to be one of the major categories of medical oncology. Many people around the world are prescribed to undergo chemotherapy treatment instead of undergoing a surgical procedure. But many are frightened with the side effects of this treatment as it is believed to reduce the quality of life of the patients.

What is chemotherapy?

Chemotherapy is a procedure where non-specific intracellular poisons are used, which are specifically related to preventing the process of mitosis or the natural cell division of the cancerous cells. This technique rather excludes those agents that are responsible for selective extracellular growth signal blockade (signal transduction blockers). If spoken about these agents used in chemotherapy, it has been found that most of them are cytotoxic in nature due to their property of interfering with natural mitosis. However, the cells of cancer can differ widely in terms of showing susceptibility to these administered agents.

Chemotherapy can be defined as a way of mass destruction of stress cells, which would eventually lead to the death of the cells when apoptosis is initiated. The commonly known side effects of chemotherapy can be traced back to the process of damaging normal non-cancerous cells, which are in the process of rapid division. They are sensitive to anti-mitotic drugs that are being administered to the patient and such cells may include the cells of the hair follicles, digestive tract lining, and bone marrow. But nowadays treatment options have undergone a lot of modification by which these side effects can be well countered.

Types of Chemotherapy Drugs

Various options of drugs are available to treat different types of cancer including the following:

Alkylating agents: These kinds of agents prove to be extremely beneficial during the cell’s resting phase. The various kinds of alkylating agents that are employed in chemotherapy treatment include the following:

  • Mustard gas derivatives: Cyclophosphamide, mechlorethamine, chlorambucil, ifosfamide, melphalan
  • Ethylenimines: Thiotepa and hexamethylmelamine
  • Alkylsulfonates: Busulfan
  • Metal salts: Oxaliplatin, cisplatin, and carboplatin
  • Nitrosoureas: Streptozocin, lomustine, carmustine

Nitrosoureas are unique from the rest for choices in chemotherapy treatment due to their ability to cross the blood-brain barrier and treating tumors of the brain.

Plant alkaloids: Plant alkaloids employed for chemotherapy treatment are derived from plants.  These include vinca alkaloids, taxanes, podophyllotoxins, and camptothecan analogs. The plant alkaloids are cell cycle specific agents, which enables them to attack the dividing cells in various stages of their division cycle.

Antimetabolites: This kind of chemotherapy treatment involves substances that are similar in composition to the normal substances present in the cell. When these substances get incorporated in the process of cellular metabolism, then the cell is no longer able to divide. They are also cell cycle specific and can be classified further according to the substance in the cell with which they interfere.

Topoisomerase inhibitors: When the topoisomerase enzymes in the body ( topoisomerase I and II) are inhibited as a result of chemotherapy drugs, then those drugs are referred to as topoisomerase inhibitors. During the chemotherapy, the topoisomerase enzymes are responsible for controlling structural manipulation of the DNA which is necessary for the purpose of replication.

Miscellaneous antineoplastics: Different types of drugs make each chemotherapy treatment process unique. Enzymes, retinoids, adrenocortical steroid inhibitor, ribonucleotide reductase inhibitor or antimicrotubule agents can be used as chemotherapy drugs.

Frequently Asked Questions
What area of specialization does Dr. Ibrahim Tek have?
Dr. Ibrahim Tek is specialized in Turkey and of the most sought after doctors in Cancer Specialist.
Does Dr. Ibrahim Tek offer Telemedicine Consultation through Medigence?
No, this doctor dose not offer telemedicine via MediGence
How many years of experience does Dr. Ibrahim Tek have?
Dr. Ibrahim Tek is one of the most sought after specialists in Turkey and has over 13 Years years of experience.
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