Halaman 23 - Dokter Terbaik di Dunia

Dr. Suleyman Ayvaz is an Associate Professor in Pediatric Surgery. He has performed many successful pediatric surgical procedures. Dr. Ayvaz is known for his work in minimally invasive techniques. He has published many articles in peer-reviewed journals. He has received several national and international accreditations. Dr. Ayvaz is also dedicated to teaching and mentoring young surgeons.

Harun Kaya is a hair transplant specialist. He completed the Anesthesia Technician Program at Istanbul Okan University (2018–2020).

Experience: Hair Transplant Assistant at Este Future Clinic (2020–2021). Hair Transplant Technician at Rizza Hair Clinic in Kosovo (2021–2022). Hair Transplant Specialist at Lokman Hekim Medical Center in Ankara (2022–2023). Hair Transplant Specialist at Emsey Hospital (2023–2024). Hair Transplant Specialist at Lokman Hekim Istanbul Hospital (2024–2026). He speaks Turkish.

Dr. Sura Celil is a dentist. She graduated from the Faculty of Dentistry at Ankara University in 2010.

Experience: Dentist at OralDent Oral and Dental Health Polyclinic (2010–2012). Dentist at WhiteDent Oral and Dental Health Polyclinic (2010–2012). Dentist at Tacenter Kurtköy Oral and Dental Health Polyclinic (2012–2017).

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. Volkan Seneger completed medical school at Dokuz Eylül University Faculty of Medicine (2007–2014). He then trained in psychiatry at Göztepe Training and Research Hospital (2015–2019). He worked as a general practitioner at Erzurum Aşkale State Hospital (2014–2015). He practiced psychiatry at Düzce Atatürk State Hospital (2019–2022), Istanbul Pendik State Hospital (2022–2025), and Private Mercan Hospital (2025).

He currently practices at Lokman Hekim Istanbul Hospital (2025–present). He is a member of the Turkish Psychiatry Association and the Turkish Medical Association.

Dr. Nihal Durmus Kocaaslan is an Associate Professor of Plastic, Reconstructive, and Aesthetic Surgery at Marmara University. Kocaaslan holds TPRECD and EBOPRAS certifications (2013). Kocaaslan became a Fellow of the American College of Surgeons (FACS) in 2021. Kocaaslan has served as a Forensic Expert at the Ministry of Justice since 2019. Kocaaslan earned a PhD in Forensic Medicine in 2020.

Expertise includes orthognathic, maxillofacial, and jaw surgery, as well as cleft lip and palate and other congenital anomalies. Kocaaslan also specializes in breast and chest wall reconstruction, chronic wound repair, and aesthetic surgery.

International training includes reconstructive microsurgery at RWTH Aachen. It also includes breast, face, and body aesthetics at clinics in the United States and cleft care at Seattle Children’s. Kocaaslan trained in craniosynostosis at Erasmus University Rotterdam and in maxillofacial and orthognathic surgery at St. George’s Hospital. Kocaaslan is a board member of EPCD and active in wound care and cleft associations. Memberships include ACS, ISAPS, the American Cleft Palate Foundation, and AO Craniofacial.

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.

Dr. Fatima Bayramova completed a Bachelor’s degree at the Azerbaijan Medical Faculty in 2014. She completed residency training at Hacettepe University Faculty of Medicine in 2020 and at Istanbul University in 2025. She served as a Research Assistant in Internal Medicine at Hacettepe from 2016 to 2020. She then worked as a Specialist at Erdem Hospital in 2021. From 2021 to 2025, she was a Research Assistant in Endocrinology and Metabolic Diseases at the Istanbul Faculty of Medicine.

Her expertise includes diabetes mellitus, thyroid disease, obesity, adrenal and pituitary disorders, and osteoporosis. She also studies the correlation between bone marrow aspiration and biopsy results. She is a member of the Turkish Society of Endocrinology and Metabolism.

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.

Dr. Gokhan Ertas is a Professor of Cardiology with more than 20 years of clinical and academic experience. He has published 52 articles in international peer-reviewed journals. He has also contributed 3 chapters to national and international books. Dr. Ertas has presented 20 papers at international meetings and 25 at national meetings. He is dedicated to advancing cardiovascular medicine.

He is a member of the Turkish Society of Cardiology, the European Society of Cardiology, and the Stem Cell and Cellular Therapies Association. Dr. Ertas is recognized for his academic work and active role in the global cardiology community.

Dr. Serhat Seyhan is a medical genetics specialist. He is the Head Physician at the Genetic Disorders Evaluation Center, Memorial Şişli Hospital in Istanbul. He has also led genetic evaluation centers at Biruni University Hospital and Bakırköy Dr. Sadi Konuk Training and Research Hospital. Dr. Seyhan chaired the Department of Medical Genetics at Istanbul Medipol University.

He completed his medical genetics training at Karadeniz Technical University. He earned his MD from Cumhuriyet University. Dr. Seyhan gained international experience as a short-term scholar at the University of Miami. He is known for his leadership in clinical genetics and his academic work in the field.

Dr. Umit Tuncel is an ENT specialist. He earned his medical degree from Ankara University Faculty of Medicine (1986–1992). He completed his ENT residency at Ankara Numune Training and Research Hospital (1993–1996). He has more than 30 years of ENT experience in Turkey.

He was Head of Clinic at Ankara Keçiören Training and Research Hospital (2005–2008) and at Ankara Oncology Training and Research Hospital (2008–2018, 2022–2024). This totals about 15 years in leadership roles. His practice focuses on head and neck cancers, surgery for snoring and sleep apnea, rhinoplasty, and pediatric ENT. He is currently an ENT specialist at Lokman Hekim Istanbul Hospital (2024–present).

2020 - Present, Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Neurology Specialist

2009 - 2020, Istanbul/Türkiye

PRIVATE SİŞLİ FLORENCE NIGHTINGALE HOSPITAL

Neurology Specialist

2008 - 2008, Sakarya/Türkiye

SAKARYA YENİKENT STATE HOSPITAL

Neurology Specialist

2007 - 2008, Ankara/Türkiye

ANKARA OCCUPATIONAL DISEASES HOSPITAL

Neurology Specialist

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

2006 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Pediatric Endocrinology Specialist

2006 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL ATASEHIR HOSPITAL

Pediatric Endocrinology Specialist

2001 - Present, Istanbul/Istanbul/Türkiye

CERRAHPAŞA MEDICAL FACULTY

Head of the Department of Pediatric Endocrinology

1996 - Present, Istanbul/Istanbul/Türkiye

CERRAHPAŞA MEDICAL FACULTY

Founder and Head of Adolescent Science Branch

1993 - 2001, Istanbul/Istanbul/Türkiye

CERRAHPAŞA MEDICAL FACULTY

Member of the Department of Pediatric Endocrinology

1992 - 1993, London/London/England

UNIVERSITY OF LONDON MIDDLESEX HOSPITAL

Visiting Chief Resident of Pediatric Endocrinology and Cellular Endocrinology

1989 - 1992, Istanbul/Istanbul/Türkiye

CERRAHPAŞA MEDICAL FACULTY

Chief Assistant of the Department of Pediatric Endocrinology

1987 - 1989, /Türkiye

MINISTRY OF HEALTH OF THE REPUBLIC OF TURKEY NO.6 AÇSAP

Child Health and Diseases Specialist

1985 - 1987, /Türkiye

MINISTRY OF HEALTH OF THE REPUBLIC OF TURKEY SEREFLIKOCHISAR STATE HOSPITAL

Child Health and Diseases Specialist

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

Dr. Tugce Bigis is a skilled dentist. She graduated as valedictorian from Suphi Koyuncuoğlu Anatolian High School. She then completed her dental degree at Ege University Faculty of Dentistry, ranking second in her class. She has shown strong academic performance throughout her studies.

Dr. Bigis continues to improve her skills by attending professional courses, trainings, and congresses. She stays updated on the latest developments in dentistry. Her dedication to learning helps her provide high-quality dental care to her patients.