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Oncology
Doctors
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Medical Specialties
Oncology
Doctors
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Prof. Yener Koc

Prof. Yener Koc

Hematologist-Oncologist, Bone Marrow Transplant Specialist
4.2
5 reviews
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Istanbul, Turkey
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Clinical experience: over 40 years
Languages: EnglishTürkçe
Reviews about Prof. Yener Koc
Abod al-Sharqawi
Verified review
Abod al-Sharqawi
Hematologic disease
I visited Medicana Hospital in Beylikduzu, and overall it is a very good clinic — large, well-organized, and professional. Professor Yener, a hematologist, is truly excellent at his work. He is highly competent and carefully monitors the patient's condition step by step. The hospital also has a translation team that works wonderfully, especially Rama, the translator. She does not just translate but also helps, gives advice, and significantly facilitates all procedures within the hospital. She also coordinates appointments with the doctor and other organizational matters, thanks to which the entire process goes very smoothly. Honestly, my communication with the hospital was mostly through her, and she was extremely supportive. The only drawback is the very high prices. Without insurance, it is almost impossible to pay. My advice — get tests done outside the hospital, but follow-up monitoring and consultations are best done at Medicana, because both the doctors and the translation team are truly at a high level. 02/10/2025
Gökhan Baydemir
Verified review
Gökhan Baydemir
Non-Hodgkin B-cell lymphoma
Before going to Professor Yener Koc, be sure to get a second, and preferably a third, opinion. 10 years ago, we approached him in Antalya with my father's diagnosis — non-Hodgkin B-cell lymphoma. Without any consideration, he immediately said that my father's stomach had to be removed and scheduled the surgery date. The next day, we consulted another hematology professor, who explained that this was a medically very incorrect and dangerous approach, that for such lymphomas, removing the stomach directly puts the patient at risk, and that the proper treatment is chemotherapy. My father underwent treatment based on the second opinion and recovered completely after about a year. Had we followed the first advice, it is unknown whether he would still be alive today. Even if he had survived, he would have had to live without a stomach and on a large amount of medication. This experience showed us that even if a doctor holds the title of "professor," it does not mean that every decision he makes is correct. Especially in matters of life and death, one cannot rely on the opinion of a single specialist — it is essential to consult other doctors. It is also worth searching for previously published, but now removed from the internet, information about unsuccessful bone marrow transplant cases involving this doctor. 27/01/2026
Ahmet Yılmaz
Verified review
Ahmet Yılmaz
Non-Hodgkin B-cell lymphoma
We turned to Professor Yener Koc for treatment of my father. The doctor immediately performed a thorough diagnosis, explained the therapy plan in detail, and accompanied us at every stage. Thanks to a properly selected treatment and attentive monitoring, we managed to achieve stable remission. Very grateful for the professionalism and support. 14/06/2025
Omar Khaled
Verified review
Omar Khaled
Hematologic disease
I underwent treatment with Professor Yener Koc at Medicana Clinic. I was very satisfied with the level of medical care: the doctor closely monitors the patient's condition, adjusts treatment, and is always available. I would also like to note the well-coordinated work of the team and the convenient organization of the process for international patients. 09/03/2025
Mehmet Demir
Verified review
Mehmet Demir
Lymphoma
Professor Yener Koc made the impression of an experienced and attentive specialist. During the consultation, he explained everything in simple and clear language, proposed an effective treatment plan, and supervised every stage of therapy. The doctor's confidence and individualized approach were felt, which helped me go through treatment calmly. 27/01/2025
Hematologist-Oncologist, Bone Marrow Transplant Specialist
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Clinical experience: over 40 years

Professor Yener Koc is one of Turkey’s leading specialists in bone marrow and stem cell transplantation. After training in the USA — at Boston University and Tufts University — he returned to Turkey in 1999 and personally founded four transplantation centers in succession: at Hacettepe University, Yeditepe University, MedicalPark Antalya, and Medicana International Istanbul.

Today, he heads a modern 21-bed unit with a team of 34 people, including its own HLA-typing laboratory. This makes it possible to perform all types of stem cell transplantation — autologous, allogeneic related and unrelated, and haploidentical.

Throughout his career, Professor Koc has performed more than 1,900 transplants. According to the clinic, the eight-year survival rate for multiple myeloma after allogeneic transplantation is around 66%, for haploidentical transplantation in leukemia patients in first remission — 75%; for thalassemia and aplastic anemia, the cure rate reaches 80–90%.

Since 2004, he has been an active JACIE inspector; author of more than 230 scientific publications; recipient of the international “Healthcare Professional of the Year” award (Cambridge, 2007).

Achievements and Awards

Founder of 4 bone marrow transplantation centers in Turkey.
Over 1,900 bone marrow transplants performed.
"International Healthcare Professional of the Year" Award (Cambridge, England) — 2007
O-1 Visa (USA) for outstanding achievements in medicine — 1997
Boston University Awards (USA) — 1995–1996

About Professor Yener Koc

Specialization

Hematology / hematologic oncology (medical specialization — internal medicine + hematology-oncology).

Areas of specialization:

  • autologous and allogeneic bone marrow transplantation (including haploidentical and from unrelated donors),
  • treatment of leukemias, lymphomas,
  • myelodysplastic syndrome (MDS),
  • multiple myeloma,
  • thalassemia and aplastic anemia.
Education
  • 1979–1985 — Hacettepe University School of Medicine, Ankara (MD diploma).
  • 1987–1991 — residency in internal medicine, Hacettepe University.
  • 1991–1992 — clinical fellow, Hacettepe University Institute of Oncology.
  • 1992–1994 — research fellow, Evans Memorial Department / Boston University Medical Center, USA.
  • 1994–1996 — clinical fellow in hematology-oncology, Boston University Medical Center.
  • 1996–1997 — fellow in bone marrow transplantation, Tufts University School of Medicine, New England Medical Center, USA.
  • 1997 — “Cancer Medicine and Hematology” course, Harvard Medical School.
Clinical Experience
  • 1990–1991 — senior resident in internal medicine, Hacettepe University
  • 1997–1999 — instructor, Bone Marrow Transplant Unit, Tufts University School of Medicine / New England Medical Center.
  • 1999–2005 — Associate Professor, Hacettepe University Institute of Oncology, Stem Cell Transplant Unit; founder of the transplantation department (197 transplants).
  • 2005 – present — Professor of Hematology/Oncology, Yeditepe University Medical School (director of the transplantation department, 105 procedures during 2005–2008)
  • 2005–2006 — Head of the Department of Internal Medicine, Yeditepe University.
  • 2008–2019 — Director of the Bone Marrow Transplantation Department, MedicalPark Antalya
  • 2019 – present — transplantation specialist, Medicana International Hospital Group.
  • 2020 – present — founder and head of the Bone Marrow Transplantation Center, Medicana International Istanbul.
Scientific Activity

Google Scholar: more than 5,100 citations.

The clinic’s website and Bookimed list more than 230 publications.

Co-author of major international EBMT studies on haploidentical transplantation (Cancer 2021, Bone Marrow Transplantation, Nature).

Topics: transplantation in acute leukemias, lymphomas, myeloma; development of new drugs (nucleoside analogs).

Awards: 2007 — “International Healthcare Professional of the Year” (International Biographical Institute, Cambridge, England); 1997 — O-1 Visa for outstanding achievements in medical science (USA); 1995, 1996 — Boston University awards.

Membership in Associations
  • JACIE Accreditation Inspector (European Bone Marrow Transplant Centers / ISCT-EBMT) — since 2004.
  • European Society for Blood and Marrow Transplantation (EBMT).
  • International Society for Cell & Gene Therapy (ISCT).
Medicana International Istanbul
Clinic where the doctor sees patients
Medicana International Istanbul
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Turkey, Istanbul

Medicana International Istanbul is the flagship of the Medicana Health Group network, one of the largest private medical networks in Turkey. A multidisciplinary center focused on international patients.

The Bone Marrow Transplantation Center was founded in 2020 by Professor Yener Koc. It is a modern 21-bed unit with a team of 34 specialists: hematologists, coordinators, biologists, a clinical pharmacist, and specially trained nurses. It also has its own immunology laboratory and HLA-typing laboratory, which is important for donor matching.

The center performs all types of stem cell transplantation: autologous, allogeneic from related and unrelated donors, and haploidentical. According to the clinic, the eight-year survival rate for multiple myeloma is around 66%, for haploidentical transplantation in leukemia patients in first remission — 75%; for thalassemia and aplastic anemia, the cure rate reaches 80–90%.

An international department is available for foreign patients: transfer, interpreter, document assistance, and video consultations before arrival.

Published 25.04.2026, Updated 30.04.2026
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