Page 24 - Les Meilleurs Médecins au Monde

Dr. Omer Necip Aytug is a respected gastroenterologist. He graduated from Hacettepe University School of Medicine in 1980. He became an internist at Cukurova University in 1985. He completed his gastroenterology fellowship at Marmara University in 1997.

He was named Associate Professor at Firat University in 1989. In 1998, he became a Professor at Abant Izzet Baysal University. Dr. Aytug has written many scientific papers and book chapters. He has also attended several national and international congresses.

He has held important academic and clinical roles at Duzce University Faculty of Medicine, Camlica Medicana Hospital, and Memorial Service Hospital. These positions have established him as an expert in gastroenterology.

Dr. Mehmet Aydogan is a specialist in Orthopedics, Traumatology, and Spine Surgery at Memorial Şişli Hospital. He worked in Spine Surgery there in 2024–2025 and has been in Orthopedics since 2026. He previously led the Orthopedic Surgery, Traumatology & Advanced Spine Surgery Center at Emsey Hospital (2018–2022). His experience includes the EURO SPINE Surgical Spine Center of Excellence in Switzerland (2022–2024) and a research fellowship at the UCLA Comprehensive Spine Center (2009–2011). He also held posts at Boğaziçi Spine Center, Medical Park Göztepe, and Florence Nightingale.

Education: MD, Ege University (1990–1996). Residency in Orthopedics and Traumatology at Dr. Lütfi Kırdar Kartal TRH (2000–2004). Publications: 50 journal articles and 37 presentations.

Memberships: TTB, TOTBİD, Turkish Spine Society, MINOD, NASS, SRS, European Spine Society, and APSS.

Dr. Beyza Topcu is an expert in Nutrition and Dietetics. She earned her Bachelor’s degree from Gumushane University (2014-2018). She has worked at Diettherapy Nutrition and Diet Counseling Center, Mestetik Aesthetics and Beauty Center, Estetica Beauty and Aesthetic Center, Academy Fitness, and Zafiran Restaurant.

Dr. Topcu focuses on clinical nutrition, dietary therapy, and wellness programs. She has a strong record of helping patients improve their health. She uses evidence-based methods and provides personalized care. Dr. Topcu is dedicated to promoting better nutrition through effective counseling and practice.

Dr. Emrah Ugurlu is an experienced ENT specialist. He focuses on rhinoplasty, revision nose surgery, blepharoplasty, endoscopic sinus surgery, head and neck surgery, and vocal cord diseases. He graduated from Akdeniz University Faculty of Medicine. He completed his ENT training at Dokuz Eylul University.

Dr. Ugurlu has published articles in respected journals, such as the Turkish Archives of Otorhinolaryngology. His work has helped advance care in pediatric rhinosinusitis, ossiculoplasty, and hearing aid outcomes. He is a member of the Turkish Ear Nose Throat and Head and Neck Surgery Foundation, Istanbul Medical Chamber, and Facial Plastic Surgery Association.

Medical Experience

- *2024 - Present*: Memorial Şişli Hospital  

 Ophthalmology Specialist / Istanbul

- *2022 - Present*: Private Clinic  

 Ophthalmology Specialist / Istanbul

- *2019 - 2022*: Liv Hospital Ulus  

 Ophthalmology Specialist / Istanbul

Medical Education

- *2014 - 2018*: Selcuk University Faculty of Medicine  

 / Konya / Turkey

- *2004 - 2010*: Azerbaijan Medical University Faculty of Medicine  

 / Baku / Azerbaijan

2001 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Head of Cardiovascular Surgery Department

1990 - 2001, Istanbul/Istanbul/Türkiye

FLORENCE NIGHTINGALE HOSPITAL

Head of Surgical Sciences

1990 - 1995, Istanbul/Istanbul/Türkiye

ISTANBUL UNIVERSITY INSTITUTE OF CARDIOLOGY

Cardiovascular and Surgery Specialist

1987 - 1990, London/London/England

ST. THOMAS HOSPITAL

Chief Resident of Cardiovascular Surgery

1986 - 1987, Istanbul/Istanbul/Türkiye

ISTANBUL UNIVERSITY FACULTY OF MEDICINE

Chief Assistant of Cardiovascular Surgery

1985 - 1986, Ankara/Ankara/Türkiye

GÜLHANE MILITARY MEDICAL ACADEMY

Dr. Nurettin Demirkol is a physician with expertise in hypertension, hyperlipidemia, thyroid diseases, diabetes, and vascular conditions. He also manages the follow-up of chronic diseases. Dr. Demirkol has strong experience in identifying causes and making diagnoses. He provides advanced care in internal medicine.

He completed his undergraduate and specialization training at Istanbul University, Istanbul Faculty of Medicine. He also earned a master’s degree in Health Management from Okan University. Dr. Demirkol has worked at Hisar Intercontinental Hospital, Kozyatağı Central Hospital, and Istanbul Faculty of Medicine. He has made important contributions to patient care and chronic disease management at these institutions.

Dr. Orhan Shencan is a medical oncology specialist. He graduated from Hacettepe University Faculty of Medicine in 1988. He completed his Internal Medicine residency at Ankara Training Hospital between 1990 and 1994. He finished his Medical Oncology training at Ankara University between 1997 and 1999. He became an Associate Professor in Medical Oncology in 2009.

He has held Internal Medicine and Medical Oncology posts at İnönü University, Ankara Training Hospital, and Ankara University Faculty of Medicine. He also worked at Ankara Etlik Specialty Hospital, Private Lokman Hekim Hospital, Acıbadem Maslak Hospital, and Fatih University (Associate Professor, 2012–2016). He later worked at Sante Oncology Center and Medical Park Gebze Hospital.

He practiced at King Hamad University Hospital, Bahrain Oncology Center, from 2017 to 2023. In 2024 he worked at Acıbadem Bodrum Hospital. He currently practices at Avicenna Ataşehir Hospital (2024–) and Lokman Hekim Istanbul Hospital (2025–).

Dr. Koray Tuncer is a gastroenterology specialist at Memorial Şişli Hospital in Istanbul. He has worked there since 2009. He previously served at Private Yunus Emre Hospital from 2003 to 2009.

He earned his MD from Istanbul University, Istanbul Faculty of Medicine (1982–1988). He completed an Internal Medicine residency at SSK Okmeydanı Hospital (1989–1993). He served as Chief Assistant in Internal Medicine at Kartal Training and Research Hospital (1995–1998). He completed gastroenterology fellowships at Haydarpaşa Numune Hospital (1998–1999) and Ege University (1999–2003).

Professional memberships include the Turkish Society of Gastroenterology, the Turkish Association for the Study of the Liver, and the Turkish Medical Association.

He has 5 international and 13 national publications. He has delivered 8 international and 41 national presentations. His additional training includes summer internships at Kantonsspital Aarau (Anesthesiology, 1985) and Kantonsspital Münsterlingen (Internal Medicine, 1987). He regularly attends postgraduate gastroenterology and hepatology courses and national congresses.

Prof. Dr. Erdem Akbal is a Gastroenterology Specialist at Memorial Şişli and Memorial Bahçelievler Hospitals in Istanbul. He previously served at Liv Hospital Ulus, Medicana Ataşehir, Florence Nightingale Hospitals, and Çanakkale Onsekiz Mart University. He became an Associate Professor in 2014 and a Professor in 2019.

He received advanced training in interventional endoscopy. He completed ESD at Jichi Medical University in Japan. He trained in POEM/ESD and gastrointestinal motility at Amsterdam Medical Center. He trained in EUS at Johns Hopkins Hospital in the USA. He continues to attend ESG, ERCP, EUS, ESD, and POEM courses and congresses.

He has authored more than 100 international indexed publications. His presentations have won awards. He is a member of the Turkish Society of Gastroenterology, the Gastrointestinal Endoscopy Society, the Hepatobiliary and Pancreatology Society, the Liver Diseases Association, the IBD Association, and the Turkish Liver Research Association.

Prof. Mustafa Sağlam, M.D. graduated from Marmara University School of Medicine in 1994 and has specialized in Endovascular Repair of the Aneurysm of Abdominal Aorta, Stress Test for imaging the Coronary Artery Diseases, Ambulatory Cardiac Monitoring, Holter Test, Balloon Valvuloplasty and Temporary Pacemaker. He is currently the Head of the Cardiology Department in Hisar Hospital Intercontinental.

Dr. Yavuz Yalcin is a specialist in endocrinology and metabolic diseases at Memorial Sisli Hospital in Istanbul, where he has worked since 2014. He previously served at Memorial Etiler, Private Ordu Medical Park, and Ordu State Hospital. He completed an endocrinology fellowship at Ankara Numune from 2009 to 2012. Before that, he finished an internal medicine residency at SSK Goztepe and earned his medical degree from Akdeniz University.

Academic work includes 8 international and 10 national publications. He has given 10 international and 20 national presentations and attended 39 scientific meetings. He holds the Internal Medicine Board certification (2002), Hemodialysis Responsible Physician certification (2005; renewed 2013), and Occupational Physician certification (1998). He completed thyroid and neck ultrasonography courses in 2012–2013. He is a member of the Society of Internal Medicine, the Metabolic Syndrome Society, and the Turkish Society of Endocrinology and Metabolism.

Medical Experience

- *2024 - Present*: Memorial Şişli Hospital  

 Ophthalmology Specialist / Istanbul

- *2022 - 2024*: Liv Hospital Ulus  

 Ophthalmology Specialist / Istanbul

- *2021 - 2022*: Private Clinic  

 Ophthalmology Specialist / Istanbul

- *2019 - 2021*: Şişli Hamidiye Etfal Training and Research Hospital  

 Ophthalmology Specialist / Istanbul

- *2017 - 2019*: Gaziosmanpaşa Taksim Training and Research Hospital  

 Ophthalmology Specialist / Istanbul

- *2015 - 2017*: Tirebolu State Hospital  

 Ophthalmology Specialist / Giresun

 Medical Education

- *2011 - 2015*: Cumhuriyet University Hospital  

 / Sivas / Turkey

- *2000 - 2007*: Gazi University Faculty of Medicine  

 / Ankara / Turkey

Prof. Dr. Ayla Güven graduated from Gazi University Faculty of Medicine in 1986 and completed her mandatory service at Ege University Chest Diseases Bornova Tuberculosis Dispensary. Following that, she started her specialization training in the Department of Child Health and Diseases at Hacettepe University Faculty of Medicine and became a specialist in 1993. After working as a specialist physician, she began her subspecialty training in Pediatric Endocrinology at Gazi University Faculty of Medicine in September 2000 and became a Pediatric Endocrinology specialist in December 2002. In April 2003, she started working as an assistant professor at Ondokuz Mayıs University Faculty of Medicine and worked in the Pediatric Endocrinology and Diabetes Department at the Children’s Hospital of Pittsburgh, USA, between May and November 2003. After returning to Turkey, she continued to work at Ondokuz Mayıs University Faculty of Medicine. This clinic was the first to offer Pediatric Endocrinology subspecialty training in the country. During her time there, one person became a Pediatric Endocrinology specialist. On March 13, 2006, she successfully passed the exam and received the title of Associate Professor. Since December 2006, she has been working at Göztepe Training and Research Hospital. In this hospital, she was appointed as the head of the Pediatric Endocrinology clinic in November 2008 and started providing Pediatric Endocrinology subspecialty training for the first time in the hospital in March 2009. Between 2009 and 2017, she trained five Pediatric Endocrinology specialists. Most of the physicians she currently provides subspecialty training to have gained academic titles as professors and associate professors. After working as a training instructor at Health Sciences University Zeynep Kamil Hospital for Children and Women from 2017 to 2021, she retired at her request from public service. Between 2021 and 2024, she worked as a Pediatric Endocrinology specialist at Başkent University Faculty of Medicine, Department of Child Health and Diseases, at Istanbul Hospital.

MEDICAL INTERESTS

• Menstrual disorders and increased hair growth in girls, polycystic ovary syndrome
• Adrenal diseases
• Sexual development disorders
• Type 2 diabetes
• Thyroid diseases
• Growth disorders: short stature and tall stature
• Puberty disorders: precocious puberty-delayed puberty

Dr. Taha Bahadir Uskul is a specialist in pulmonology and tuberculosis at Memorial Şişli Hospital in Istanbul. He previously worked at Florence Nightingale Hospitals and Istanbul Okan University Hospital.

He earned his MD from Istanbul University. He completed his specialization in pulmonology and tuberculosis at SB Istanbul Süreyyapaşa Chest Diseases and Thoracic Surgery Training and Research Hospital. He received Turkish Board Certification in Pulmonology in 2002. He is trained in interventional bronchoscopy, medical thoracoscopy, transbronchial needle aspiration, rigid bronchoscopy, and polysomnography.

His awards include Excellent Presentation and the Harasawa Fellowship (APSR, 2006). He also received a Certificate of Appreciation in 2008. He has 11 international and 23 national peer-reviewed publications and numerous presentations.