Best Doctors in the World — Page 20

Dr. Servet Alan is a specialist in infectious diseases and clinical microbiology at Memorial Şişli Hospital. He holds a Master’s degree in pediatric infectious diseases from Istanbul University. Dr. Alan also earned a Master’s in hospital and healthcare management. He treats patients at a JCI-accredited facility known for world-class safety standards.

• Member of the Klimik Association and the Turkish Society of Microbiology.
• Active member of the Association for Hospital Infections and Control.
• Served as a specialist at Haseki Training and Research Hospital for 15 years.
• Participates in numerous international microbiology congresses and seminars.

Dr. Birol Baysal is a gastroenterology specialist at Memorial Şişli Hospital in Istanbul. He has held clinical and academic roles at major Turkish medical institutions. Dr. Baysal serves as a lecturer in gastroenterology at Bezmialem Foundation University. He works at a JCI-accredited facility known for its high clinical safety standards.

• Treats a variety of digestive system disorders and colorectal conditions.
• Served as a gastroenterology specialist at Diyarbakir Training and Research Hospital.
• Practices at Memorial Şişli, the first hospital in Turkey to earn JCI accreditation.
• Maintains a clinical focus on internal medicine and digestive health.

Dr. Faruk Eroglu is an ophthalmologist at Hisar Hospital Intercontinental in Istanbul. He has performed over 10,000 argon laser procedures. Dr. Eroglu specializes in retinal diseases, cataract surgery, and excimer laser therapy. He trained at Istanbul University’s Faculty of Medicine. His practice focuses on diabetes-related yellow spot treatment and refractive surgery.

• Completed over 5,000 excimer laser treatments and 1,000 cataract surgeries.
• Maintains membership with the American Academy of Ophthalmology.
• Member of the European VitreoRetinal Society and the International Ocular Inflammation Society.
• Works at Hisar Hospital, a JCI-accredited facility serving 500,000 patients annually.

Dr. Gulumser Kiziltas Tokmak is a neurologist at Hisar Hospital Intercontinental in Istanbul. She holds a master’s degree in electrophysiology from Istanbul University. Dr. Tokmak specializes in brain health, treating conditions like dementia, chronic headaches, and vertigo. She works at a JCI-accredited facility known for international patient safety standards.

• Specializes in diagnostic studies including EMG, EEG, and polysomnography (PSG).
• Treats complex neurodegenerative disorders like Alzheimer’s, Parkinson’s, and multiple sclerosis.
• Manages specialized neurological therapies, including medication for essential tremors and ALS.
• Performs advanced diagnostic monitoring, such as video-EEG and electroneurography.

Dr. Orhan Shencan is a clinical oncologist at Lokman Hekim Istanbul Hospital. He attained an associate professorship in medical oncology in 2009. Dr. Shencan treats patients at a JCI-accredited facility in Istanbul. He completed his medical oncology training at Ankara University.

• Served as a medical oncology specialist at the Bahrain Oncology Center.
• Held a former associate professor role at Fatih University Faculty of Medicine.
• Practiced at several major Turkish institutions, including Acıbadem Maslak Hospital.
• Works at a clinic that treats over 10,000 patients every year.

Dr. Ibrahim Erdim is an ENT specialist at Lokman Hekim Istanbul Hospital. He specializes in rhinoplasty, head and neck cancer surgery, and pediatric ENT. Dr. Erdim developed the Nasal Axis Lateralization Suture Technique for crooked nose correction. He works at a JCI-accredited facility that treats 10,000+ patients annually.

• Authored the Stapes Stabilizing Cartilage Graft technique for middle ear surgery.
• Published research on the effects of propolis on salivary glands after radiotherapy.
• Member of the Istanbul Association of ENT and Head & Neck Surgeons.
• Expertise includes neurotology and medical facial aesthetic procedures.

Assoc. Prof. Dr. Servet İğrek is an Orthopaedics and Traumatology specialist trained at Marmara University. He practices at Diyarbakır Selahaddin Eyyubi State Hospital and Kartal Dr. Lütfi Kırdar City Hospital.

He focuses on sports injuries and arthroscopic surgery. He has extensive experience in knee, shoulder, hip and ankle arthroscopy; ligament and meniscus surgery; shoulder instability; cartilage injuries; arthroplasty; and orthopaedic trauma.

He completed a SECEC & ESSKA‑approved Sports Surgery Fellowship Program. He has authored or co‑authored many peer‑reviewed publications, book chapters and congress presentations. He teaches in national and international arthroscopy training programs. He is an active member of the Turkish Orthopaedics and Traumatology Association, TUSYAD, the Turkish Shoulder and Elbow Surgery Association, the Hip and Knee Arthroplasty Association, and SICOT.

Dr. Safak Olgan is a gynecologist and IVF specialist at Memorial Antalya Hospital. He focus on reproductive medicine and laparoscopic surgery. He treats infertility using research-backed methods for embryo transfer and uterine health. Dr. Olgan works at a JCI-accredited facility meeting international safety standards.

• Winner of the EBCOG Andre Van Assche Kuleuven award for best study.
• Representative for Turkey in the European Network of Trainees in Obstetrics and Gynecology.
• Researches the effects of obesity and endometrial compaction on IVF success.
• Expert in uterine manipulation techniques for laparoscopic hysterectomy.

Dr. Mehmet Saygi is a cardiology specialist at Hisar Hospital Intercontinental in Istanbul. He has performed over 2,500 coronary angiographies throughout his career. Dr. Saygi specializes in the diagnosis and treatment of coronary artery disease and heart failure. He works at a JCI-accredited facility that serves 500,000+ patients annually.

• Performed over 300 stent and balloon procedures.
• Expert in transesophageal echocardiography and holter monitoring for arrhythmias.
• Treats complex cardiovascular conditions including heart valve diseases and hypertension.
• Trained at Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital.

Dr. Remziye Dogan is a cardiologist at Hisar Hospital Intercontinental in Istanbul. She specializes in the diagnosis and treatment of coronary artery disease and heart failure. Dr. Dogan serves at a JCI-accredited facility that treats 500,000+ patients annually.

• Performs coronary angiography, balloon angioplasty, and stent placement.
• Expert in transesophageal echocardiography (TEE) for heart valve diseases.
• Treats arrhythmias using Holter monitoring and medical management.
• Manages complex hypertension and pulmonary hypertension cases.

Dr. Toluy Ozgumus is a hematologist at Hisar Hospital Intercontinental in Istanbul. He has diagnosed and treated over 1,000 patients with bleeding and coagulation disorders. He specializes in the treatment of rare hematological cancers and bone marrow transplantation. Dr. Ozgumus works at a JCI-accredited facility recognized for excellence in hematology-oncology.

• Performs allogenic bone marrow transplants from both related and unrelated donors.
• Treats complex blood cancers including acute leukemia, multiple myeloma, and lymphomas.
• Expert in managing hematological findings related to Covid-19 infections.
• Differentiates myeloproliferative diseases from other causes of blood cell elevation.

Dr. Mustafa Temel is an ophthalmologist at Memorial Şişli Hospital in Istanbul. He has dedicated his career to eye care since starting his medical practice in 1985. Dr. Temel previously served as a specialist at GATA Training Hospital and various marine hospitals. He works at a JCI-accredited facility recognized for world-class safety standards.

• Specializes in general ophthalmology and eye health diagnostics.
• Completed specialist training at GATA Training Hospital.
• Treats international patients at one of Turkey's premier multidisciplinary centers.
• Practices at a clinic that holds ISO quality certification.

Assoc. Prof. Dr. Heves Sürmeli is a specialist in Internal Medicine and Medical Oncology. She received her medical degree (M.D.) from Eskişehir Osmangazi University in 2004. She completed her Internal Medicine residency at Kartal Dr. Lütfi Kırdar Training and Research Hospital, Istanbul (2005–2010). She then completed subspecialty training in Medical Oncology at the same hospital (2014–2017).

At the same center, she served as a Medical Oncology Specialist (2017–2023). She then worked as Administrative and Clinical Director (2023–2026). Her clinical interests include breast, lung, gynecologic, gastrointestinal, and urologic cancers.

She has published many articles in international peer‑reviewed journals. She has presented at national and international conferences. She is active in professional societies. She has received several awards.

Dr. Zinar Serhanoglu practices obstetrics, gynecology, and urogynecology. He provides prenatal care and pregnancy follow-up. He manages high-risk conditions such as preeclampsia and gestational diabetes. He performs vaginal and cesarean deliveries.

He specializes in minimally invasive surgery. He uses laparoscopy and V-NOTES for hysterectomy and for treating uterine disorders, ovarian cysts, fibroids, and ectopic pregnancy.

He treats stress urinary incontinence and pelvic organ prolapse. He provides long-term management of PCOS and endometriosis. He offers tubal ligation via laparoscopy or V-NOTES. He performs hysteroscopic treatment of uterine polyps and septum. He also provides perimenopausal and menopausal care, including bioidentical hormone therapy.

Dr. Oguzhan Babacan is a pediatric hematologist-oncologist at Hisar Hospital Intercontinental in Istanbul. He specializes in bone marrow transplantation for children with leukemia and lymphoma. Dr. Babacan has performed allogeneic, autologous, and haploidentical stem cell transplants for 13 years. He treats rare blood disorders and solid tumors in pediatric patients.

• Performs complex bone marrow transplants for leukemia and lymphoma cases.
• Treats childhood blood disorders like thalassemia, hemophilia, and aplastic anemia.
• Expertise in pediatric oncology, including neuroblastoma and Ewing's sarcoma.
• Works at Hisar Hospital, a JCI-accredited facility in Turkey.

Dr. Sinan Çomu is a pediatric neurologist at Memorial Şişli Hospital in Istanbul. He applies American treatment methods learned during his extensive training in the USA. Dr. Çomu treats movement disorders, epilepsy, and developmental delays in children. He is a member of the Child Neurology Society.

• Specializes in pediatric neurology, genetic problems, and behavioral disorders.
• Completed a child neurology residency at the University of Pittsburgh.
• Treats neurological conditions in fetuses during high-risk pregnancies.
• Practices at JCI-accredited Memorial Şişli Hospital.

Prof. Dr. Şule Karadayı is a Professor and Thoracic Surgery Specialist. She earned her MD from Ankara University in 1999 and completed her residency in 2004. Her international training includes an observership with Prof. Ramon Rami Porta in Barcelona in 2005. She received an ESTS Travel Fellowship in Vienna in 2009. She joined the Mevlana Exchange Program in Azerbaijan in 2015. She scored 76.25 on the ÜDS English exam in 2006. She is a member of the European Society of Thoracic Surgeons and several Turkish thoracic societies.

Her clinical focus includes lung cancer surgery. She performs Da Vinci robotic and VATS/minimally invasive thoracic procedures. She treats pulmonary nodules and masses. She also performs mediastinal, pleural, and chest wall (pectus) surgery. She offers interventional bronchoscopy, including endobronchial valve therapy for advanced emphysema and COPD. She serves as an assistant principal investigator on projects in wound healing and mediastinal lymph node evaluation. As of 2026, she sees patients at Hisar Hospital Intercontinental.

Dr. Merve Karli is a general surgeon at Hisar Hospital Intercontinental in Istanbul. She has performed over 1,000 operations for hernias, breast diseases, and anorectal conditions. Dr. Karli trained at Eskisehir Osmangazi University and Sadi Konuk Training and Research Hospital. She holds official certifications to perform endoscopic procedures.

• Specializes in laparoscopic and open hernia repair, including umbilical and incisional cases.
• Performs gastroscopy, colonoscopy, and PEG insertion for diagnostic and therapeutic needs.
• Treats benign anorectal diseases and manages complex breast disease cases.
• Works at Hisar Hospital, a JCI-accredited facility serving 500,000+ patients annually.