Page 19 - Best Doctors in the World

Op. Dr. Faruk Gençoğlu completed his medical faculty career, which he started at Samsun 19 Mayıs University, by joining the academic staff of Istanbul Cerrahpaşa Cardiology Institute in 2015 and receiving his specialization in 2020. Gençoğlu, who actively took part in approximately 3 thousand cases during this process; He has performed surgery for adult cardiovascular diseases such as adult coronary artery disease, heart valve diseases (aortic-mitral-tricuspid), aortic surgery, carotid surgery, peripheral vascular diseases, venous insufficiency (varicose veins), deep vein thrombosis. Gençoğlu, who restarted cardiac surgery at Batman Training and Research Hospital in 2021, served as the clinical chief of open heart surgery for 2 years. 

FIELDS OF MEDICAL INTERESTS

Adult coronary artery disease,

Heart valve diseases (aortic-mitral-tricuspid)

Aortic surgery,

carotid surgery,

Peripheral vascular diseases,

Venous insufficiency (varicose veins),

deep vein thrombosis

The doctor graduated from Istanbul University Faculty of Medicine in 1986 and completed a dermatology residency at Haydarpaşa Numune Hospital in 1990. Specializing in dermatologic surgery, the doctor has a clinical focus on skin cancer, cryotherapy, hyperhidrosis treatment, and allergic skin diseases. The doctor is also skilled in electrocauterization, laser treatments, cosmetic dermatology, dermatoscopy, and skin rejuvenation techniques such as Botox. The doctor has worked at various institutions, including Görele Health Center, Fatih Sultan Mehmet Training and Research Hospital, and Private Istanbul Regional Hospital.

Op. Dr. Berna Buse Kobal is an obstetrics and gynecology specialist. She graduated from Acıbadem University School of Medicine in 2017. She completed clinical studies in obstetrics and gynecology at the University of Louisville in the United States. She finished her specialty training at the Health Sciences University Ümraniye Training and Research Hospital.

She performs gynecologic, laparoscopic, urogynecologic, and genital aesthetic procedures. These include V-NOTES (scarless) hysterectomy and cyst removal, hysteroscopic surgery, laparoscopy, tubal ligation, urinary incontinence treatments, HPV care, endometriosis surgery, and bioequivalent hormone therapies.

Prof. Yeşim (Yesim) Yıldırım — Medical Oncologist at Anadolu Medical Center (since 2011). ESMO-certified specialist, Professor since 2021, author of 80+ scientific publications. Trained at top centers — Rambam (Israel) and Mount Vernon (UK). Treats breast, lung, and gastrointestinal (GI) cancers, as well as melanoma and sarcomas; uses immunotherapy and targeted therapy.

Why patients choose Dr. Yeşim Yıldırım:

• 20+ years of clinical practice; Professor of Medical Oncology since 2021.
• 80+ peer-reviewed publications in tumor biology, immunotherapy, and targeted therapy — treatment plans are based on up-to-date evidence.
• ESMO certification — from Europe’s leading oncology society — confirms high qualification and continuous training to international standards.

Academic and Professional Background

• Education:
  • 1990–1996: Hacettepe University Faculty of Medicine (MD).
  • 1996–2000: Residency in ENT at Ankara Training and Research Hospital.
  • 2002: Advanced training at the House Ear Institute, Los Angeles, USA.
• Professional Experience:
  • Various roles including researcher, specialist, and chief at prominent hospitals in Turkey.
  • Since 2011: Professor at Lokman Hekim Health Group, focusing on ENT diseases.

Key Achievements and Research Contributions

• Published Work:
  • Over 30 scientific articles in international journals on ENT topics such as hearing loss, laryngeal cancer, and sinus conditions.
  • Topics include rare diseases, surgical innovations, and radiological evaluations.
  • Co-author of ENT-related books and translated chapters in notable surgical references.
• Conference Presentations:
  • Frequent presenter at national and international scientific meetings.
  • Delivered groundbreaking studies on cochlear implants, paranasal tumors, and hearing aid effects on geriatric tinnitus.
• Awards & Recognition:
  • Recognized for excellence in clinical practice and surgical training models, particularly in stapedectomy.

Clinical and Research Interests

• Diseases of the ear, nose, and throat, with a focus on: 
  • Hearing disorders (sensorineural, conductive, age-related).
  • Rhinological conditions, including sinusitis and mucosal pathologies.
  • Oncological ENT cases, specifically rare cancers of the larynx and paranasal sinuses.

International Training and Professional Development

• Attended multiple specialized courses at the House Ear Institute (USA) focusing on temporal bone surgery and pathology.
• Participation in advanced workshops and conferences such as the American Academy of Otolaryngology–Head and Neck Surgery Foundation (AAO-HNSF).

Publications and Citations

• Authored high-impact studies cited in prominent journals.
• Contributions to understanding ENT disorders through innovative research methods, such as temporal bone dissection and immunohistochemistry.

Prof. Dr. Celil Göçer is a distinguished ENT specialist whose extensive clinical expertise and academic contributions have greatly influenced the field. He is highly regarded for his innovative surgical approaches and dedication to advancing medical knowledge.

Education

• Ege Faculty of Medicine 1978
• Specialization in Pediatrics 1982
• Subspecialty Pediatric Oncology 2002 (EU Faculty of Medicine)
• Pediatric Hematology and Oncology 2012 (EU Faculty of Medicine)
• Deputy Chief of Clinic 1988 Tepecik EAH
• Clinical Chief 1993 Tepecik EAH
• Associate Professorship 1995
• Professorship  2002
• Ege U. Faculty of Medicine, faculty member 1998 – 2022
• EU Faculty of Medicine Department of Pediatrics 2009-2018
• Member of Tepecik Education Planning and Coordination Board (1993-1998)
• SSI Tepecik Hospital Ethics Committee Chairman (1996-1998)
• Turkish Society of Pediatric Hematology "Bone Marrow Transplantation Working Group Co-Chair" (2002-2006)
• Turkish Society of Pediatric Hematology "Bone Marrow Transplantation Working Group" (2006-2008)
• Turkish Society of Pediatric Hematology - Responsible for Bone Marrow Transplantation "Online" Data Registry System 2007-ongoing.
• Ege University Regenerative Medicine and Stem Cell Commission Chairman, 2011-2021

Institutional Memberships

• Turkish Medical Association İzmir and Kocaeli Branch
• Turkish National Pediatric Association - İzmir
• European Group for Bone Marrow Transplantation (EBMT); Ege University Pediatric Bone Marrow Transplantation Unit was accredited by the European Group for Bone Marrow Transplantation (EBMT) in June 2007.
• Turkish Society of Pediatric Hematology - Board Member for two terms (2005-2009)
• Turkish Society of Hematology - Board Member for two terms (2001/2005)
• Turkish Pediatric Oncology Association
• Bone Marrow Transplantation Foundation (KITVAK) Member of the Board of Trustees

Units he is the founder of                        

1- SSI Tepecik Hospital Pediatric Oncology Clinic (1990) 
2- SSI Tepecik Hospital Pediatric Bone Marrow Transplantation Unit (1992) 
3- EU Faculty of Medicine Pediatric Bone Marrow Transplantation Unit (1998) 
4- FOUNDER of JOURNAL OF PEDIATRIC RESEARCH, 2014; SCI application was made in 2022.  

Transplantation units that he contributed to the establishment of                        

1. İzmir BUÇH EAH Pediatric Bone Marrow Transplantation Unit (2019) 
2. Ümraniye EAH Pediatric Bone Marrow Transplantation Unit (2020) 
3. Kanuni Sultan Süleyman EAH Pediatric Bone Marrow Transplantation Unit (2020) (Transferred to Çam Sakura EAH)

Awards

• Thrombotic parameters in bone marrow stem cell transplant patients, Pediatric Hematology Congress, Trabzon 2003
• CD133 Antigen in Stem Cell: Pediatric Hematology Congress 2005. Research award
• The role of Toll like receptors in febrile neutropenic patients, Best poster award. Turkish Hematology Congress 2008, Çeşme-İzmir
• National pediatric stem cell transplantation activity- Oral presentation second prize, Turkish Hematology Society Stem Cell Transplantation Congress, 2022, Antalya

Publications

Kansoy S. "Bone Marrow and Stem Cell Transplantation Child Health and Diseases, 1st edition, EU Faculty of Medicine Printing House, 1999, İzmir

Kansoy S. Bone marrow transplantation in Thalassemia Major III. Aegean Thalassemia Days Book, 2000, Izmir

Kansoy S. Pediatric KIT Center Standards in Turkey. Childhood Acute Leukemias, Antalya 2000: 73-5

Kansoy S. Late Side Effects in Children. Special issue of Bone Marrow Transplantation Journal of Turkish Clinics. 2003

Kansoy S. Stem Cell Applications in Bone Marrow and Stem Cell Transplantation. Pediatric Oncology Nursing Course Book, İzmir, 2005

Kansoy S. Cord Blood as a Stem Cell Source. Stem Cell Special Issue. Turkey Clinics, 2008

Kansoy S. Stem Cell Transplantation in Lymphomas. General Pediatrics Book, Ed. Prof.Dr.Enver Hasanoglu, 2009

Kansoy S, Aksoylar S. Bone Marrow Transplantation in Children. Pediatrics, 2014 and 2017

Kansoy S. Rhabdomyosarcoma. Pediatrics, 2014 and 2017

Kansoy S. Approach to the child with cancer according to clinical findings. Pediatrics, 2014 and 2017 

11. Çetingül N, S.Kansoy, M.Kantar. Oncological Diseases. Pediatrics (Ed. A. Cura), 641-672, Ege University Print house, İzmir, 1999.  (1.05 points)

Kansoy S, M.Kantar. Head, Face and Eye Examination. Pediatric Prosthetic Physical Examination and Symptom Information (Ed. A.Cura)

Kantar M. Metabolic Emergency Problems in Oncology. Oncologic Emergencies and Supportive Care in Childhood (Ed. N. Çetingül, S. Kansoy), 15-24, Meta Basım, İzmir, 2003. 

Cord Blood Transplants in Turkey. HEMATOLOGIST, 2016

Kansoy S. Central Nervous System Tumors in Children Pediatrics, 2014 and 2017

Acute myeloblastic leukemia in children and its treatment. Pediatric Oncology Textbook, Poplack's Turkish, 2020

National pediatric stem cell transplant activity, 2020

Childhood stem cell transplantation indications, Turkey Clinics - International book 2020

In addition to the studies and papers in international journals published in large numbers, he is involved in international multicenter studies in some journals with high impact value.

Aesthetic Dentistry Specialist

Born in Istanbul, Dr. Birkan Duras graduated from Yeditepe University Faculty of Dentistry and pursued his academic career by specializing in Prosthodontics at Istanbul University, focusing on advanced research in dental restoration.

With expertise in Aesthetic Dentistry, he specializes in:

• Smile Design
• Pink Aesthetics (Gum Contouring)
• Implantology

Currently continuing his scientific research at Istanbul University, Dr. Duras is an active member of:

• Aesthetic Dentistry Academy Association (EDAD)
• Turkish Prosthodontics and Implantology Association (TPİD)
• Turkish Dental Association (TDB)

Dr. Umut Dogu is a neurosurgeon with strong experience in advanced spine care. He earned his medical degree from Hacettepe University. He completed his neurosurgery residency at Dışkapı Yıldırım Beyazıt Training & Research Hospital. Dr. Dogu has worked as a specialist at Yozgat City Hospital, Emsey Hospital Advanced Spine Center, and Memorial Şişli Hospital. He currently practices at Lokman Hekim Istanbul Hospital.

Dr. Dogu treats degenerative spine diseases, traumatic spine injuries, spinal tumors, and infectious spine diseases. He also manages congenital and developmental spinal disorders. His expertise includes pain-focused procedures such as neuromodulation and vertebroplasty. Dr. Dogu is a member of the Turkish Medical Association and the Turkish Neurosurgical Society.

The doctor specializes in orthodontic treatments, including fixed and transparent aligners, as well as addressing jaw irregularities and orthopedic correction. The doctor completed dental education at Ege University, Turkey, followed by advanced training in the Orthodontics department at the same institution.

Continuing professional development includes comprehensive courses on the Diamond System, diagnosis, treatment planning, and innovations in accelerating orthodontic tooth movement.

Dr. Ömer Kocabıyık has completed his specialization in the Department of Ophthalmology at Çanakkale Onsekiz Mart University in 2016. He performed many cataract operations at Merzifon State Hospital and at Sancaktepe Training and Research Hospital Ophthalmology Clinic. He also performs blepharoplasty (eyelid) and excimer laser treatment of refractive errors (hypermetropia, astigmatism, myopia). He diagnoses, treats and monitors medical and glaucoma diseases. His papers were published at the 2012/2013/2015/2017 Ophthalmology National Congresses.

FIELDS OF MEDICAL INTERESTS

Retina

glaucoma

Cornea

Refractive Surgery

Cataract

The doctor is an experienced orthopedic surgeon specializing in hip and shoulder replacement, serving international patients in Turkey. With expertise in managing trauma treatments of the spine and extremities, the doctor focuses on sports traumatology, including ligament and tendon injuries of the knee, such as meniscus and anterior cruciate ligament injuries.

Graduating from Cerrahpasa School of Medicine, Istanbul University, and completing residency at Istanbul Umraniye Teaching and Research Hospital, the doctor also studied Orthopedic Oncology at Goztepe Teaching and Research Hospital. Areas of interest include lower and upper extremity trauma surgery, spinal surgery, hip and knee arthroplasty, and the treatment of childhood conditions like pes equinovarus and hip dysplasia.

Dr. Nabi Gokhan Ferahcan is a specialist in family and preventive medicine. He has over 20 years of clinical experience. Since 2000, he has served as Chief Physician of the Check-up Department. He focuses on personalized health screenings and preventive care based on scientific evidence. Dr. Ferahcan manages a wide range of conditions, including liver steatosis, hypertension, high cholesterol, and anemia. He uses advanced therapies such as vitamin replacement and adult vaccination.

He completed his Family Medicine Residency at Haydarpasa Numune Hospital. He earned his medical degree from Marmara University. Dr. Ferahcan is accredited by the Istanbul Medical Chamber. He is also known for his work in medical literature and public health education.

Dr. Fulya Gokdagli Sigir is an OB/GYN focused on reproductive medicine. She earned her MD from Istanbul University Cerrahpaşa in 2006. She completed her OB/GYN residency at Istanbul Medeniyet University from 2007 to 2013. During her training, she also completed an observership in perinatology at Frankfurt Bürger Hospital.

From 2013 to 2014, she fulfilled compulsory service at Batman Sason State Hospital. She then served as an Assistant Professor at Medipol Mega University Hospital from 2014 to 2017. Her work focused on obstetrics and gynecologic oncology.

She obtained certification in Assisted Reproductive Treatment Practices in 2017 at Memorial Şişli IVF Center. She then worked for about three years as an IVF specialist. At Kolan International Hospital – Şişli IVF Center, she worked from 2021 to 2025. She served as Responsible Physician from 2023 to 2025. She has been an Assistant Professor at Galata University since 2021. Her interests include IVF, IUI, reproductive endocrinology, endometriosis and adenomyosis, and laparoscopic and hysteroscopic surgery.

Dr. Nuran Burcu ARKALI, who graduated as a medical doctor from Istanbul University Cerrahpaşa Faculty of Medicine in 2004, completed her residency training in the Neurology Clinic at Okmeydanı Training and Research Hospital in 2010 and was appointed as a neurology specialist at Diyarbakır Training and Research Hospital in the same year, participating in the establishment of the neurology clinic, ward, and intensive care unit.

In 2012, she voluntarily participated in EMG training at Kocaeli University Neurology Department, and in 2013, she started working as a neurology specialist in the private sector. She graduated from the electro-physiology master’s program conducted jointly by Istanbul University Çapa and Cerrahpaşa Medical faculties in 2019, and in the same year, she received training in Botulinum toxin application at Bezmialem University Vakıf Gureba Hospital, as well as training in ozone therapy and mesotherapy from the Ministry of Health and neural therapy.

Dr. Nuran Burcu ARKALI, who has studies related to EEG, EMG, Sleep Disorders, Botulinum toxin applications, Neural therapy, Dementia, Parkinson’s, Headache, and Ozone therapy applications, serves her patients at Hisar Hospital Intercontinental Neurology Clinic.

MEDICAL INTERESTS

• EEG,
• EMG,
• Sleep Disorders,
• Botulinum Toxin Applications,
• Neural Therapy,
• Dementia,
• Parkinson’s,
• Headache and Ozone Therapy Applications

Dr. Soner Sağaltıcı is an Oral and Maxillofacial Surgery Specialist at the Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University. He focuses on the surgical treatment of conditions affecting the mouth, jaw, and face.

He contributes to the field through research publications, academic projects, and presentations at national and international conferences. He provides evidence-based patient care and supports innovation in clinical research.

Dr. Erol Bozbora is an Ear, Nose and Throat (ENT) specialist at Memorial Bahçelievler Hospital. He earned his medical degree at Istanbul University Faculty of Medicine (2009–2015). He completed his ENT residency there (2016–2022).

His clinical work includes ENT practice at Aktif International Hospital Bahçelievler (2024–2025). He completed compulsory service at Iğdır Dr. Nevruz Erez State Hospital (2022–2024). He completed a clinical internship at HNO-Zentrum Simmering in Vienna (2023). Earlier, he completed compulsory service at Beyoğlu Community Health Center (2015–2016). He also completed an internship at the World Health Organization in Switzerland (2013).

The doctor graduated from Istanbul University's Çapa School of Medicine in 1998 and completed a residency in Radiodiagnostics and Interventional Radiology at Cerrahpaşa School of Medicine in 2002. Specializing in Diagnostic Radiology and Teleradiology, as well as Interventional Radiology, the doctor has participated in 12 local and one international congress, contributing numerous oral and written presentations. The doctor has held positions at Hisar Intercontinental Hospital, Merzifon Air Hospital, Istanbul Emar Center, and Haseki Training and Research Hospital.