Best Doctors in the World — Page 24

Dr. Mehmet Yasar Kaynar is a neurosurgeon at Memorial Şişli Hospital in Istanbul. He holds extensive leadership experience in Turkish neurosurgery. Dr. Kaynar previously directed the Istanbul University Institute of Neurological Sciences. He treats patients at a JCI-accredited facility known for its high success rates.

• Former Head of Neurosurgery at Cerrahpasa Medical Faculty, Istanbul University.
• Served as a Board Member of the Turkish Neurosurgery Association.
• Former Head of the Neurovascular Group of the Turkish Neurosurgery Association.
• Served on the qualification board for the Turkish Neurosurgery Association.

Dr. Engin Tutar is a pediatric gastroenterologist at Hisar Hospital Intercontinental in Istanbul. He is the former head of Pediatric Gastroenterology at Marmara University. Dr. Tutar has delivered over 50 presentations at national and international medical congresses. He specializes in treating complex digestive, liver, and nutritional disorders in children.

• Performs diagnostic and therapeutic endoscopy, including polypectomy and esophageal variceal bleeding control.
• Treats inflammatory bowel disease, Celiac disease, and H. pylori infections.
• Manages chronic pediatric conditions such as growth disorders and liver diseases.
• Works at JCI-accredited Hisar Hospital, which treats over 500,000 patients annually.

Dr. Nesrin Sariman is a pulmonology and sleep medicine specialist at Hisar Hospital Intercontinental. She treats asthma, COPD, and lung cancer. Dr. Sariman is a bronchoscopy specialist. She participated in a multicenter international clinical study on asthma. Dr. Sariman holds certifications in functional medicine and phytotherapy from Medipol University.

• Served as Assistant Dean at Maltepe University from 2019 to 2022.
• Treats sleep disorders including obstructive sleep apnea syndrome.
• Maintains memberships in several national and international medical associations.
• Works at Hisar Hospital Intercontinental, a JCI-accredited facility in Istanbul.

Dr. Elif Evrim Ekin is a radiologist at the JCI-accredited Hisar Hospital Intercontinental in Istanbul. She specializes in musculoskeletal radiology and breast imaging. Dr. Ekin serves as the Education Coordinator at the Radiology Education Clinic. She has published extensive research in international journals indexed in SCI and SCI-E.

• Obtained her Medical Doctor title from Ege University Faculty of Medicine.
• Completed specialized radiology training at Izmir Bozyaka Training and Research Hospital.
• Maintains a focus on musculoskeletal diagnostics and breast health imaging.
• Completed the Fundamentals of Good Clinical Practice training.
• Works at a facility that treats over 500,000 patients annually.

Dr. Ahmet Nevzat Nayir is a pediatric nephrology specialist at Memorial Şişli Hospital in Istanbul. He serves as a Professor at the Istanbul Faculty of Medicine. Dr. Nayir specializes in treating kidney and urinary tract conditions in children. He works at the first hospital in Turkey to earn JCI accreditation for safety.

• Holds a professorship in the Division of Children's Nephrology.
• Treats complex pediatric kidney diseases at a leading multidisciplinary medical center.
• Practices at a facility with a 90% success rate in organ transplantation.
• Maintains an academic role alongside his clinical practice at Memorial Şişli.

Dr. Servet Izci is a cardiologist with 24 years of clinical practice. He earned his MD at Fırat University (1996–2002). He completed a cardiology residency at Kartal Koşuyolu Training and Research Hospital (2010–2015). He worked as a consultant cardiologist at Kartal Koşuyolu (2015–2025) and Pendik Medical Park (2025–2026). He now practices at Lokman Hekim Istanbul Hospital (2026–present). He is a member of the Istanbul Medical Chamber and the Turkish Society of Cardiology.

Clinical focus: coronary angiography and stenting via radial access. He also performs peripheral and carotid artery interventions. He manages arrhythmias, hypertension, hyperlipidemia, and heart failure. Scientific output: three publications. Topics include catestatin as a predictor of mortality in acute pulmonary embolism, ECG changes during alcohol withdrawal, and the increased risk of high‑grade AV block in non‑O blood types.

Dr. Suveyda Gozukucuk is an infectious disease specialist at Hisar Hospital Intercontinental in Istanbul. She focuses on hospital-acquired infections and sterilization protocols. Dr. Gozukucuk also treats viral hepatitis and hepatitis C cases. She practices at a JCI-accredited facility recognized for high safety standards.

• Specializes in infection management for immunocompromised patients.
• Expertise in hospital sterilization and disinfection procedures.
• Completed medical specialization at Erciyes University Faculty of Medicine.
• Treats patients at a hospital serving over 500,000 people annually.

Dr. Onur Telli is a urologist and pediatric specialist at Memorial Şişli Hospital. He focuses on diagnosing and treating congenital urogenital anomalies. He has received awards from the European Association of Urology and the European Society for Pediatric Urology. Dr. Telli works at a JCI-accredited facility in Istanbul.

• Published over 50 international articles and contributed to three pediatric urology books.
• Conducted population-based research on nocturia in women of reproductive age.
• Member of the American Academy of Pediatrics Section on Urology.
• Member of the Turkish Association of Pediatric Urology.

Dr. Ozan Ali Erdal is a pediatric orthopedic surgeon at Lokman Hekim Istanbul Hospital. He specializes in treating cerebral palsy and osteogenesis imperfecta. He focuses on deformity correction and limb lengthening. Dr. Erdal performs complex surgeries for congenital bone deficiencies and hip dislocation. He works at a JCI-accredited facility that treats 10,000+ patients annually.

• Specializes in clubfoot (PEV) treatment and height extension procedures.
• Treats pediatric fractures, malunions, and chronic foot deformities.
• Completed medical specialization at Istanbul University-Cerrahpaşa.
• Corrects congenital conditions like fibular hemimelia and bowlegs.

The doctor is an Associate Professor with extensive clinical training and academic experience. Medical education was completed at Gazi University Faculty of Medicine, followed by specialized training as an Assistant Physician at Şişli Hamidiye Etfal Education and Research Hospital. Further expertise was gained through minor specialization training at the T.R. Istanbul Science University European Florence Nightingale Hospital.

With a career spanning over two decades, the doctor has demonstrated a commitment to medical excellence and academic advancement in the field, currently serving in a senior clinical and educational capacity in Istanbul.

Dr. Volkan Seneger is a psychiatrist at Lokman Hekim Istanbul Hospital. He treats a variety of mental health conditions through psychotherapy. Dr. Seneger completed his medical degree at Dokuz Eylül University. He later finished specialized psychiatry training at Göztepe Training and Research Hospital.

• Member of the Turkish Psychiatry Association and the Turkish Medical Association.
• Practices at a JCI-accredited medical center in Istanbul.
• Provides care at a facility that treats 10,000+ patients every year.
• Treats patients at a hospital certified by TÜV NORD CERT.

Dr. Abdullah Yakupoglu is an interventional radiologist at Memorial Şişli Hospital in Istanbul. He specializes in interventional oncology. Dr. Yakupoglu has held several leadership roles at major Turkish medical centers. He works at a JCI-accredited facility known for its high success rates in complex procedures.

• Served as the Interventional Radiology Manager at Acıbadem Health Group.
• Former Interventional Radiology Manager at both American Hospital and German Hospital.
• Focuses on minimally invasive techniques for treating oncological conditions.
• Practices at the first Turkish hospital to earn Joint Commission International accreditation.

The doctor is a highly experienced Cardiovascular Surgery Specialist with an extensive academic and clinical background. Currently practicing at Memorial Antalya Hospital, the doctor previously served as an Associate Professor and Assistant Professor in the Department of Cardiovascular Surgery at Akdeniz University Faculty of Medicine. With a career spanning nearly two decades, the doctor has developed deep expertise in complex cardiovascular procedures, including mechanical circulatory support, ECMO-assisted cardiopulmonary resuscitation, and peripheral bypass surgeries.

The doctor has contributed significantly to medical literature, with research published in international peer-reviewed journals focusing on vascular ablation, cardiac transplantation, and graft management.

The doctor graduated from Ege University Faculty of Dentistry, achieving the second place in the faculty. Actively engaged in all fields of Dentistry, the doctor continually advances professionally by participating in various courses, trainings, and congresses.

The doctor is a graduate of one of the premier dental schools in Istanbul. With a dedicated focus on restorative and aesthetic dentistry, the doctor is committed to providing high-quality dental care and improving patient smiles through professional clinical practice.

Dr. Burak Akbay is an ophthalmologist at Memorial Bahçelievler Hospital in Istanbul. He has performed over 1,500 oculoplastic cases. Dr. Akbay is a Fellow of the European Board of Ophthalmology (FEBO). He treats patients at a JCI-accredited medical center. This accreditation is a global gold standard for patient safety.

• Holds FEBO certification, a high mark of European professional quality.
• Completed residency training in ophthalmology at Pamukkale University.
• Active member of the Turkish Ophthalmological Society.
• Specializes in complex eye and eyelid surgery.

Dr. Deniz Gören is a hematologist at Memorial Şişli Hospital in Istanbul. She specializes in treating blood cancers and complex bone marrow disorders. Dr. Gören represents the European Society for Blood and Marrow Transplantation. She completed selective medical training at Harvard University Faculty of Medicine.

• Treats leukemia, lymphoma, myeloma, and aplastic anemia.
• Completed a specialist masterclass in lymphoma at the Turkish Academy of Blood Science.
• Practices at JCI-accredited Memorial Şişli, which reports a 90% organ transplant success rate.
• Member of the Turkish Academy of Blood Science and the EBMT.

Dr. Oguz Acar is a neurologist at Memorial Şişli Hospital in Istanbul. He is a co-author of the textbook 'Advances and Technical Standards in Neurosurgery'. Dr. Acar specializes in treating brain and spine conditions. He manages cases of glioma, epilepsy, and various movement disorders. Dr. Acar works at Turkey's first JCI-accredited medical center.

• Published over 110 scientific papers on neurological care.
• Treats complex conditions like spine tumors and skull injuries.
• Provides care for patients with herniation and nervous disorders.
• Practices at a hospital serving patients from 160+ countries annually.