Best Stomach cancer doctors in Istanbul: TOP 25 doctors

Dr. Bülent Karagöz has 20+ years focusing on stomach cancer immunotherapy and targeted therapies at Anadolu Medical Center.

• Professor of medical oncology at Istanbul Okan University
• Head of Medical Oncology at GATA Haydarpaşa Training Hospital
• Author of 40+ publications in cancer research
• Specializes in tumor biology and immunology
• Member of the Turkish Medical Oncology Association

An academic medical oncologist, Dr. Tanrikulu is actively involved in international clinical trials for new treatments.

• Board-certified specialist in both Internal Medicine and Medical Oncology
• Extensive experience in leadership roles, including as a hospital department head
• Trained at Turkey's leading medical faculties – Ankara, Istanbul, and Marmara Universities
• Ranked third nationally in the medical oncology entrance examination

900+ oncology procedures performed – Dr. Solak specializes in stomach cancer at Hisar Hospital Intercontinental.

• 19 years of experience in oncology
• Trained at Hacettepe University and UT MD Anderson Cancer Center
• Fellowship in gastrointestinal cancers at Hacettepe University Cancer Institute
• Deals with complex cases of breast, lung, and head-neck cancers

Serkan Keskin has performed over 1,100 procedures in medical oncology, specializing in chemotherapy and targeted therapy. He achieved first place on Turkey's Medical Oncology Proficiency Exam.

• 28 years of experience as a respected medical oncologist, focusing on challenging cancer types
• Best Poster Award at the 19th National Cancer Congress in 2011
• Member of the American Society of Clinical Oncology (ASCO) and European Society of Medical Oncology (ESMO)
• Published 42 articles in international journals
• Trained in Medical Oncology Minor Speciality at Istanbul University Institute of Oncology

Prof. Kivanc Derya Peker has performed over 400 stomach cancer surgeries and trained at Mayo Clinic's Hepatopancreatobiliary Surgery Clinic.

• 21 years of experience in gastroenterology surgery
• Co-founded the HPB Surgery unit at Dr. Sadi Konuk Hospital
• Specializes in pancreatic, liver, and stomach cancer surgeries
• Holds accreditation from the Turkish HPB Association
• Performed over 900 procedures including kidney transplants

Professor Yesim Yildirim specializes in cancer immunotherapy and targeted therapies, with over 80 international publications. She treats gastrointestinal cancers at Anadolu Medical Center.

• Member of European Society of Medical Oncology (ESMO)
• Expert in precision medicine for stomach cancer
• Professor at Haliç University in Istanbul
• Completed advanced training in immunotherapy at Mount Vernon Cancer Center

Specializes in personalized oncology treatments, incorporating immunotherapies and targeted therapies for better patient outcomes.

• Completed Medical Oncology fellowship at Marmara University
• Participated in Observership Program at Houston Methodist Hospital
• Attends national and international oncology congresses regularly
• Works with patients from various countries including the US and Europe

Over a decade of specialized experience in neuroendocrine and complex upper gastrointestinal cancers. Dr. Yildiz practices at Medipol Mega University Hospital.

• Senior oncologist managing a wide range of rare and difficult cancers
• Published 15+ scientific papers in international medical journals
• Specialized experience in treating neuroendocrine tumors of the gut
• Clinical expertise includes both common and unusual cancer presentations

Prof. Sezer Sağlam specializes in gastrointestinal oncology with extensive experience at Istanbul University Oncology Institute.

• Professor of Medical Oncology since 2016
• Fellowship-trained at Istanbul University Medical Faculty
• Member of ESMO, ASCO, and Turkish Medical Oncology Association
• Works at Gayrettepe Florence Nightingale Hospital

Professor Doctor Sefik Igdem specializes in Radiation Oncology at Gayrettepe Florence Nightingale Hospital, focusing on advanced treatments like Truebeam Stx Technology.

• Expert in head and neck cancers
• Uses conformal treatments for precise radiation therapy
• Professor at T.R Demiroğlu Bilim University

Assoc. Dr. Abdullah Sakin leads the Medical Oncology Department at Medipol Bahçelievler Hospital, specializing in stomach cancer.

• Head of Medical Oncology at Yüzüncü Yıl University Faculty of Medicine
• Trained in medical oncology at İstanbul Okmeydanı Eğitim ve Araştırma Hastanesi
• Specialist in internal medicine from İstanbul Haseki Eğitim ve Araştırma Hastanesi
• Extensive experience in oncology clinics across prestigious hospitals

Dr. Yahya Ozel trained in Hepato-Biliary-Pancreatic Surgery at Tokyo University Hospital under renowned experts M. Makuuchi and N. Kokudo.

• 30+ years of experience in general surgery
• Specializes in minimally invasive and robotic techniques
• Certified in surgical endoscopy with Turkish Surgical Proficiency Certificate
• Academic faculty member at Doğuş University

Dr. Saban Sec specializes in gastrointestinal cancers, with a strong focus on stomach cancer, and is an active member of the Turkish Medical Oncology Association.

• Medical oncology specialist since 2017
• Published research on HER2-positive metastatic gastric cancer
• Works at Bahçelievler Medikalpark Hospital
• Member of the Turkish Medical Oncology Association

Professor Ondzhel leads the Surgery Department at Medipol University Hospital, with deep expertise in gastrointestinal cancers.

• Board-certified oncological surgeon since 2009
• Trained in colorectal surgery at the renowned Cleveland Clinic in the USA
• Member of the European Society of Coloproctology
• Holds an International Fellowship from the American Society of Colorectal Surgeons
• Recipient of a 'Most Successful Scientist of the Year' national award for healthcare research

Assistant Professor Tahsin Ozadli brings 21 years of oncology experience, specializing in gastrointestinal cancers including stomach cancer.

• Performed 1,100+ procedures in medical oncology
• Trained at Ankara Oncology Hospital – Turkey's leading cancer center
• Special focus on gastric and esophageal cancers
• Published researcher in oncology field

Dr. Kaplan specializes in radiation oncology, focusing on precise treatment approaches for stomach cancer at Medipol Mega University Hospital.

• Expert in advanced radiation therapy techniques
• Works with a multidisciplinary team for comprehensive care
• Dedicated to personalized treatment plans

Associate Professor Tahsin Ozatli specializes in gastrointestinal cancers at Istinye Liv University Hospital.

• Over a decade of experience in oncology
• Worked at Ankara Oncology Clinic and Erzurum Regional Training Hospital
• Board-certified in internal medicine
• Promoted to Associate Professor in 2016

Dr. Ozden brings over 20 years of experience in internal medicine and medical oncology, with specialized training from Istanbul University's prestigious Cerrahpaşa Faculty of Medicine.

• Completed medical oncology subspecialty at Kocaeli University Faculty of Medicine
• Extensive experience in internal medicine across multiple hospitals
• Graduated from English Medical Program at Istanbul University

Dr. Irfan Cicin is a Professor of Medical Oncology at the Trakya University Faculty of Medicine (2015–present). He has over 20 years of medical oncology experience and has held academic roles since 2010.

Education: MD, Istanbul University – Cerrahpaşa (1991–1997). Residency in Internal Medicine, Trakya University (1997–2002). Fellowship in Medical Oncology, Trakya University (2002–2004).

Practice: Medical Oncologist, Trakya University (2005–2008). Medical Oncologist, Elazığ Training and Research Hospital (2008–2010). Associate Professor of Medical Oncology, Trakya University (2010–2015). He previously served as a physician in the Turkish Air Force at Etimesgut Military Hospital (2004–2005).

Dr. Muhammed Mustafa Atci is an Associate Professor of Medical Oncology at İstinye University, Liv Hospital Topkapı (2025–present). He previously served as Associate Professor and Education Coordinator at Prof. Dr. Cemil Taşcıoğlu City Hospital (2023–2025). He was also a Medical Oncologist there (2018–2021).

He has been a member of ASCO and the Turkish Society of Medical Oncology since 2018. He is the author or co-author of 19 peer-reviewed international papers on colon, breast, gastric, pancreatic, lung, thyroid, sarcoma, and colorectal cancers.

Notable works include a multicentre study on stage IIB colon cancer survival (Journal of Chemotherapy). He also studied the De Ritis ratio for lung metastasis in testicular cancer (Current Urology). His prognostic studies used PET/CT, MSI, lymph node ratio, and metabolic tumor volume.