Page 3 - Best diagnosticians in Istanbul: TOP 120 doctors

Dr. Derya Can has been an Assistant Professor of Dermatology at Medipol Health Group since 2021. She diagnoses and treats diseases of the skin, hair, nails, and mucosa. Her areas of expertise include eczema, atopic dermatitis, acne, psoriasis, sexually transmitted infections, warts, herpes, shingles, and fungal infections.

Dr. Can manages both benign and malignant skin tumors. She also treats hair and nail disorders, vitiligo, and other common skin conditions. She performs advanced procedures such as hair transplantation and PRP therapy for hair loss.

• AREAS OF INTEREST
• Spine surgery
• Scoliosis
• Kyphosis
• Childhood spinal diseases
• Degenerative spine diseases
• Lumbar cervical disc herniation
• Knee hip joint disorders
• Orthopedic trauma surgery

• Education and Specialization
• 2010 - Cerrahpasa Faculty of Medicine - Medical Education
• 2016 - Medeniyet University Goztepe Training and Research Hospital - Specialization

• Experience
• 2016 - 2022 - Sisli Hamidiye Etfal Training and Research Hospital
• 2015 -2016 - Chicago Loyola University, Illinois, USA

• Courses and Certificates
• 13.12.2019-14.12.2019 Turkish Spine Society Eurospine Accredited Education Modules
• 08.11.2019-10.11.2019 Turkish Spine Society Eurospine Accredited Education Modules
• 31.08.2015-04.09.2015 Basic Microsurgery Course, MICROSURGERY EDUCATION-RESEARCH LABORATORY
• AO Trauma Course-Basic Principles of Fracture Management
• 07.06.2014-10.06.2014 Fracture Management, Kodi Kojima Chairperson AOTrauma Education Commission
• 01.03.2013-02.03.2013 Instrumentation in Arthroscopic Surgery

• Professional Memberships
• Turkish Orthopedics and Traumatology Association (TOTBİD)
• Turkish Medical Association - Istanbul Medical Chamber

Education:

• Degree: Faculty of Medicine, Trakya University, 2009
• Medical Specialty: Internal Medicine, Bakırköy Dr. Sadi Konuk Training and Research Hospital, 2010-2014
• Specialist Doctor: Internal Medicine, Kanuni Sultan Süleyman Training and Research Hospital, 2014-2019
• Specialist Doctor: Internal Medicine, Turkish Hospital Internal Medicine Clinic, Qatar, 2019-2020
• Specialist Doctor: Internal Medicine, Istanbul Medipol University Hospital Mega Hospital Internal Medicine Department, 2020-2024
• Associate Professor Doctor: Internal Medicine, Istanbul Medipol University Medipol Acıbadem Regional Hospital, 2024-Present.

Roles in Projects:

Sub investigator (Assistant Researcher) in the SOUL Study: Cardiovascular Outcome Research of Semaglutide in Type 2 Diabetic Patients, approved by the Turkish Medicines and Medical Devices Agency on May 22, 2019.

Sub investigator (Assistant Researcher) in the international study “SCALE™ Insulin”: Efficacy and Safety of Liraglutide 3.0 mg in Overweight or Obese Patients with Type 2 Diabetes Treated with Basal Insulin (Study Code: NN8022-4272), conducted by Novo Nordisk A.Ş.

Subinvestigator (Assistant Researcher) in the international study NN5401-4266 StepByStep Intensification conducted by Novo Nordisk.

Assistant Researcher in the study "A Research Study to Compare Semaglutide to Insulin Aspart, When Taken Together With Metformin and Insulin Glargine, in People With Type 2 Diabetes (SUSTAIN 11)" (2019-2020).

Assistant Researcher in the PIONEER 1 study: Randomized Clinical Trial of the Efficacy and Safety of Oral Semaglutide Monotherapy in Comparison With Placebo in Patients With Type 2 Diabetes.

Dr. Koray Karabulut is a general surgery specialist at Memorial Göztepe Hospital (2025–). His focus is HPB surgery, liver transplantation, and robotic or minimally invasive surgery. He was the responsible specialist at the Fırat University Liver Transplant Center (2014–2018). He then worked as an organ transplantation specialist at Memorial Şişli (2018–2019). In 2024, he worked in robotic HPB surgery at Ageo Medical Center.

Training highlights include minimally invasive HPB at IRCAD (2015). He completed a research fellowship at the Cleveland Clinic on liver tumors and laparoscopic‑robotic surgery (2010–2011). He also completed liver transplant training at the İnönü University Institute (2011–2012). He earned his MD and finished his general surgery residency at Istanbul University. He became an associate professor in 2013. His academic work includes peer‑reviewed papers in J Gastrointest Surg, Surgery, and Surg Endosc. He has written surgical book chapters. He is a guideline author for the Turkish Surgical Society and served on editorial boards (2011–2016).

Dr. Rahsan Adviye is a Neurology Specialist at Memorial Göztepe Hospital (2025–present). She has over 20 years of specialist practice in Istanbul. She previously worked at Fatih Medical Park (2004–2008) and Hisar Hospital (2009–2010). From 2010 to 2025, she served as a Neurology Specialist and instructor at the University of Health Sciences, Kartal Dr. Lütfi Kirdar City Hospital. This post included 15 years of academic teaching.

She completed her Neurology residency at Istanbul University Cerrahpaşa Faculty of Medicine (1999–2004). She earned her M.D. there in the English-language program (1991–1998). She is a member of the Turkish Neurology Society, the Istanbul Medical Chamber, and the EEG-EMG Clinical Neurophysiology Society. She attended the Master’s Program in Clinical Neurophysiology at Istanbul University. She has also taken part in many national and international scientific meetings.

Dr. Ozgur Kilickesmez is an interventional neuroradiology and interventional radiology specialist at Memorial Goztepe Hospital in Istanbul (2025–present). He previously worked at Medicana Atakoy and Zincirlikuyu (2024–2025). He also served at Basaksehir Cam ve Sakura City Hospital (2020–2024), Istanbul Training and Research Hospital (2012–2020), and Guy’s and St Thomas’ Hospital in London (2011–2012).

He is a Professor at the University of Health Sciences (2020). He was an Associate Professor at Yeditepe University Hospital (2010). He completed training in interventional oncology at King’s College University (2011) and in interventional radiology at Cerrahpasa (2010). He provides international training in minimally invasive tumor therapy, non-surgical thyroid interventions, new-generation embolization, and stent-based brain aneurysm treatment. He is a member of RSNA, ESR, CIRSE, and ESNR. He also belongs to Turkish radiology, neuroradiology, interventional radiology, and oncology societies.

Dr. Bulen Can is an endocrinology specialist at Memorial Göztepe Hospital (2025–present). He previously worked at Acıbadem Ataşehir (2024–2025). From 2017 to 2024, he was a faculty member in the Division of Endocrinology at Istanbul Medeniyet University. He also practiced at Ankara Numune, Kastamonu Dr. M. İslamoğlu, and Ümraniye Training and Research Hospitals. He has been an endocrinology specialist since 2013.

He completed subspecialty training in Endocrinology and Metabolic Diseases at Istanbul University, Istanbul Faculty of Medicine (2009–2013). Before that, he finished his Internal Medicine residency at Bezm‑i Âlem Vakıf Gureba (2003–2009). He received his M.D. from the Istanbul Faculty of Medicine. He is a member of TEMD, TİHUD, TTB, and the Istanbul Medical Chamber. He attended the 46th TEMD Congress (2025), Aydın Endocrine Days (2022), and Clinical Research Training (2017).

Dr. Sumeyre Seda Ertekin is a general surgeon and surgical oncologist at Memorial Göztepe Hospital (2025–present). She previously worked at Academic Hospital (1999–2025), Marmara University Hospital (1991–2010), Gülhane Military Medical Academy Haydarpaşa (1997–1998), and Haukeland University Hospital in Bergen, Norway (2000–2008).

She holds UEMS European Board of Surgery certification in General Surgery (2012) and a subspecialty in Breast Surgery (2012). She completed Ministry of Health subspecialty training in Surgical Oncology (2012). She finished her General Surgery residency at Marmara University (1991–1996).

Memberships and roles: Founding Member, Breast Surgery Association. Country Coordinator, OPBS. Member, EORTC‑BCG, BRESO, IBUS, SENATURK, and the Istanbul Breast Diseases Society. Member, Global Technical Oversight Group (THET–ABS). Honorary Member of the Bulgarian Surgical Society, the Romanian Society of Breast Surgery and Oncology, and ABSI (India).

Dr. Kazibe Demir is an Obstetrics and Gynecology Specialist at Memorial Göztepe Hospital (2025–). She previously worked at Kadıköy Medicana Hospital (2022–2025) and Dr. Lütfi Kırdar Kartal Training and Research Hospital (2018–2022). She focuses on urogynecology.

Education: MD, Ankara University (2010). Obstetrics and Gynecology residency, Ankara University Faculty of Medicine (2016). PhD program in Urogynecology, Ankara University – University of Health Sciences (2020–2025).

Professional memberships: Turkish Urogynecology and Pelvic Rehabilitation Society; International Urogynecological Association (IUGA). Continuing education: IUGA 2025 (Barcelona). EUGA 2025 (Varese). Turkish Urogynecology and Pelvic Rehabilitation Society Meeting 2024 (Istanbul).

Dr. Esra Esim Buyukbayrak is an obstetrics and gynecology specialist and a perinatology (maternal–fetal medicine) subspecialist. She has practiced at Memorial Göztepe Hospital since 2025. She served as Head of Department and Clinical Administrative and Training Director at the Marmara University Faculty of Medicine from 2022 to 2025. From 2015 to 2025, she worked at Marmara University Pendik Training and Research Hospital as a perinatology subspecialist. She also served there as associate professor and later professor.

She holds an MD from Marmara University. She completed residency in obstetrics and gynecology and subspecialty training in perinatology. She received WHO–IAMANEH reproductive health training in Geneva in 2004. She completed advanced obstetrics and gynecology training in 2013. She trained in fetal surgery at Centro Gestar, Brazil, in 2023.

She has 86 SCI/SSCI-indexed articles and 84 nationally indexed articles. She has delivered 51 international and 40 national congress presentations. She has written 9 book chapters and supervised 15 doctoral dissertations. She serves as a reviewer and editorial board member for several journals.

Dr. Nurullah Bulut is an ophthalmology specialist at Memorial Göztepe (2025–) and Memorial Bahçelievler (2023–). He previously worked at the University of Health Sciences Kartal Dr. Lütfi Kırdar as a specialist (2013–2022) and as an associate professor (2022–2023). He received the title of associate professor (Doçent) in 2022.

He has 26 peer-reviewed articles, 29 conference papers, one book chapter, and a patent application for an intraocular lens design. He is a member of EURETINA YOURS, the Turkish Medical Association, and the Turkish Ophthalmological Society.

Training: ESCRS PRK/LASEK/Epi-LASIK/LASIK course (2011); ocular electrophysiology, Germany (2011); vitreoretinal surgery observer program, University of Chicago (2014). Education: MD, Atatürk University (2008). Ophthalmology specialization, Kartal Dr. Lütfi Kırdar (2009–2013).

Dr. Mustafa Aydın is an Internal Medicine specialist. He graduated from Gazi University Faculty of Medicine in 2009. He provides evidence-based care for adults, including diagnosis and treatment. He communicates in English.

His clinical focus includes chronic disease management, such as diabetes, hypertension, high cholesterol, and thyroid disorders. He treats gastrointestinal problems, including reflux, gastritis, ulcers, and liver diseases, and respiratory diseases like asthma and COPD. He manages infectious diseases. He provides preventive care with routine screenings, risk assessments, and personalized health plans.

Education & Expertise

1995 to 2001 | Ege University Faculty of Medicine – Medical Education

2001 to 2006 | Dokuz Eylül University Faculty of Medicine – Internal Medicine Specialization

2008 to 2011 | Göztepe Training and Research Hospital – Gastroenterology Subspecialty

2014 | Ümraniye Training and Research Hospital – Associate Professor of Gastroenterology

2021 | University of Health Sciences – Professor

Professional Experience

2007 | Nusaybin State Hospital – Internal Medicine Specialist (Civil Service Obligation)

2011 to 2014 | Ümraniye Training and Research Hospital – Gastroenterology Specialist

2014 to 2017 | Ümraniye Training and Research Hospital – Associate Professor of Gastroenterology

2017 to 2021 | Health Sciences University – Associate Professor of Gastroenterology

2015 to 2021 | Ümraniye Training and Research Hospital Gastroenterology Clinic – Clinic Chief

2021 to 2022 | University of Health Sciences – Professor of Internal Medicine and Gastroenterology

2015 to 2022 | Genomic Laboratory (GLAB) Coordinator, Istanbul Provincial Health Directorate

2014 to 2021 | Northern Clinics of Istanbul Journal (indexed in WoS and PubMed) – Founding Editor

2021 to Present | Turkish Liver Research Association – Board Member

2022 to Present | Hepatology Bulletin Journal – Editor

2019 to Present | Hepatology Forum Magazine – Editor

2016 to Present | World Journal of Hepatology – Editor

International Experience

1999 | Trainee Doctor, Regional Infectious Diseases Unit, Western General Hospital, Edinburgh, UK

2000 | Trainee Doctor, Cardiology Unit, North Manchester General Hospital, Manchester, UK

2005 | Assistant Doctor, Regional Infectious Diseases Unit, Western General Hospital, Edinburgh, UK

Professional Memberships

Turkish Gastroenterology Association

Turkish Liver Research Association

EASL – European Association for the Study of Liver

APASL – Asian Pacific Association for the Study of Liver

AAAS – American Association for the Advancement of Science

Awards & Recognitions

2013 | Liver Fibrosis Pathways in Chronic Hepatitis B: A Comparative Proteomic Study – Gilead Fellowship Award

2014 | Liver Fibrosis Pathways in Chronic Hepatitis B: A Comparative Proteomic Study – Viral Hepatitis Fight Association Project Support Award

2014 | The Relationship between Spontaneous Seroconversion and Toll-Like Receptor Gene Polymorphism in Hepatitis B Infection – Turkish Gastroenterology Association, Best Poster Second Prize

2015 | Research on Damage Pathways in Liver Tissue in Chronic Hepatitis B: A Comparative Proteomic Study – Turkish Gastroenterology Association, Best Oral Presentation Third Prize

2016 | Investigations of the EGF and Its Receptor EGFR Gene Variants in Ulcerative Colitis – XV Euroasian Congress of Gastroenterology and Surgery, Best Oral Presentation Third Prize

Dr. Ozlem Yogurtcu is a general surgeon with extensive experience. She graduated from Dokuz Eylul University Faculty of Medicine. She completed her general surgery residency at Haseki Training and Research Hospital, 1st Surgical Clinic. She is fluent in English.

Her practice includes gastrointestinal surgery (gallbladder disease, hernias, appendicitis, other gastrointestinal conditions). It also includes endocrine surgery (thyroid, parathyroid, adrenal) and breast surgery (benign and malignant conditions). She treats emergency and trauma cases. She performs minimally invasive laparoscopic procedures.

She is known for precise surgery and a patient-centered approach.

Dr. Aygul Aliyeva Onen is a specialist in obstetrics and gynecology at Memorial Göztepe Hospital (2025–present). She previously worked at Medical Park Göztepe (2023–2025) and at Celal Bayar University Hafsa Sultan Hospital (2018–2023). She completed her obstetrics and gynecology residency at Celal Bayar University Faculty of Medicine (2018–2023). She graduated from Azerbaijan Medical University (2010–2016) and completed an observership at Ege University (2017).

Professional memberships include the Istanbul Medical Chamber, the Turkish Society of Gynecology and Obstetrics, and the Pelvic Floor and Cosmetic Gynecology Association. Additional training includes Current Approaches in Cosmetic Gynecology (TJOD Izmir); CCI HADYEK Laparoscopic Gynecologic Surgery; Sexual Health Federation—Vaginismus and Dyspareunia; the 1st–3rd International Pelvic Floor and Cosmetic Gynecology Congresses; and the TJOD Obstetric Simulation Course.

Dr. Basak Sargin is an obstetrics and gynecology (OB/GYN) specialist at Memorial Göztepe Hospital. She has worked at Medipol Mega University Hospital (IVF and Reproductive Health Center), Medipol Acıbadem Region, Memorial Ataşehir Hospital, and Kars Harakani State Hospital.

Accreditations: FMAS and DMAS, World Laparoscopy Hospital (2023). ART training, American Hospital (07/2024–01/2025). Fellowships: Minimally Invasive and Advanced Gynecologic Surgery, Pius University, Oldenburg (07/2025); World Laparoscopy Hospital (05/2023). Additional training in robotic surgery, hysteroscopy, vNOTES, embryo transfer simulation, and laser/magnetic stimulation.

Education: MD, Hacettepe University. OB/GYN residency, Ankara (2016–2021). PhD candidate in Biomedical Engineering, Koç University (since 2023). Memberships: SRGS, International Society of Gynecology and Obstetrics, ESGE, WALS, and Istanbul Medical Chamber.

Dr. Isik Okuyan is an obstetrics and gynecology specialist at Memorial Göztepe Hospital in Istanbul (2025–present). He previously worked at Şanlıurfa Training and Research Hospital (2023–2025). He completed his OB/GYN residency at SB University Istanbul Training and Research Hospital (2019–2023). He earned his MD from Mersin University (2011–2017).

His credentials include GESEA Level 1 in Gynecological Endoscopy (Marseille, 2024). He presented a video and a poster at the 33rd ESGE Congress (2024). He is a member of the Turkish Medical Association, the Turkish Society of Gynecology and Obstetrics, and ESGE. He took part in meetings from 2022 to 2025, including ISON and national gynecology congresses.

Dr. Berrak Beyoglu Oruc is a specialist in obstetrics, gynecology, and IVF at Memorial Göztepe Hospital (2025–). She previously worked at Bahçeşehir University Medical Park Göztepe Hospital and Ağrı Training and Research Hospital. She also served as a research physician in gynecologic oncology at Bologna University S. Orsola (2022).

Accreditations and key training include: Certified ART Clinical Training, American Hospital (2025); GESEA MIGS Level 1 – European Certified Minimal Invasive Gynaecological Surgeon (2024). She also completed the Harvard Women’s Health and Menopause Course (2025), ESGO ORSI Robotic Surgery (2022), ESGO Masterclass (2022), and TMFTP Second Trimester Ultrasound (2024).

Awards: First prize, oral presentation—Transperineal Ultrasonography in Predicting Operative Delivery (13th Maternal–Fetal Medicine and Perinatology Congress, 2023). Third prize—Aortic Dissections (2016). Memberships: ISUOG, ESGE, MIJID, TJOD.

Dr. Haluk Caglar Karakaya is a specialist in cardiovascular surgery at Memorial Göztepe Hospital in Istanbul (2025–). He previously worked as a specialist at the University of Health Sciences Sancaktepe Şehit Prof. Dr. İlhan Varank Training and Research Hospital (2022–2025). He completed residency training at the University of Health Sciences Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital and at Ankara University. He earned his MD from Hacettepe University (English program).

Professional memberships: European Society for Cardiothoracic Surgery (EACTS), European Society for Vascular Surgery (ESVS), Turkish Society of Cardiovascular Surgery, National Society of Vascular and Endovascular Surgery.

Continuing education: 27th European Vascular Course (2024); Cardiac Memorial Robotic/Minimally Invasive Cardiac Surgery Summit (2024); 18th Turkish Cardiovascular Surgery Congress (2024); 24th ASVS Congress (2023); TKDCD Endovascular Course (2023); “Grey Areas in Vascular Surgery” Symposium (2023); Basic and Advanced Doppler Ultrasonography Course (2023).

Dr. Hidayet Demir is a Cardiovascular Surgery Specialist at Memorial Göztepe Hospital (2025–). He previously served as an Assistant Professor at Okan University Hospital (2021–2025). He was also a specialist at Ağrı I. Ç. University Training and Research Hospital (2019–2021). Earlier, he worked at City Health Group as Medical Director and ECMO Specialist (2015–2018). He later served as CEO (2018–2025).

Education: MD, Istanbul University Cerrahpaşa (2007–2013). Cardiovascular Surgery residency, SBÜ Kartal Koşuyolu (2013–2019). Beating‑Heart Coronary Bypass observer, Royal Brompton & Harefield Hospital (2018).

Memberships: TKDCD, UVECD, Turkish Medical Association, ESVS, EACTS. Courses: MIRC 2017 (minimally invasive/robotic). UVECD & EVC 2017 Venous Workshop. European Vascular Course 2017: Open Abdominal Aortic Aneurysm Treatment. TKDCD advanced aortic surgery. ESVS aortic arch techniques.