Gastroscopy with biopsy Doctors in Istanbul, Turkey — Page 2

Dr. Yahya Ozel is a general surgeon at Estexper Clinic in Istanbul. He has performed over 12,000 procedures during his career. Dr. Ozel specializes in bariatric, metabolic, and oncological surgery. He completed training at Tokyo University Hospital in Japan. This training focused on complex liver and pancreatic surgery.

• Performed over 5,000 bariatric and 2,500 metabolic surgeries.
• Placed more than 4,000 gastric balloons for weight loss.
• Treats gastrointestinal cancers, including stomach, colon, and liver cancer.
• Holds the Turkish Surgical Proficiency Certificate.

The doctor is a highly trained general surgeon with extensive expertise in advanced laparoscopic techniques. Having completed medical education at Ondokuz Mayıs University in 1991 and specialization at KTÜ Faculty of Medicine Farabi Hospital in 1998, the doctor has pursued rigorous post-graduate training at prestigious institutions. This includes specialized certifications in laparoscopic surgery, laparoscopic antireflux procedures, and advanced bariatric surgery.

Furthermore, the doctor possesses significant clinical experience in morbid obesity management and oncological cancer surgery, having completed advanced training at Istanbul University Cerrahpaşa Faculty of Medicine. The doctor focuses on minimally invasive surgical interventions to improve patient outcomes in complex general surgery cases.

The doctor is a highly specialized surgeon with extensive expertise in oncological and metabolic procedures. The clinical focus encompasses a wide range of cancer surgeries, including complex interventions for pancreatic, bile duct, gastric, colon, and thyroid malignancies, as well as specialized breast surgery.

In addition to oncology, the doctor is proficient in bariatric and metabolic surgery, providing advanced surgical solutions for obesity and diabetes management. The practice is dedicated to delivering comprehensive surgical care, utilizing evidence-based techniques to address both malignant conditions and metabolic health disorders.

Dr. Yilmaz Bilgic is a gastroenterologist at the JCI-accredited Medipol Acibadem District Hospital in Istanbul. He specializes in the treatment of Crohn's disease, ulcerative colitis, and complex liver disorders. Dr. Bilgic completed specialized endoscopy training at Anam Hospital in South Korea. He also finished a training course on ERCP at the Olympus Training Center in Germany.

• Performs diagnostic and therapeutic endoscopy, colonoscopy, and stomach resection.
• Treats gastrointestinal conditions including Barrett's esophagus and chronic pancreatitis.
• Served as Assistant Chief Physician at Inonu University Turgut Ozal Medical Center.
• Maintains a Google Scholar H-index of 10 for his research in gastroenterology.

Dr. Cemalettin Aydin is a professor of general surgery at Medipol Acibadem District Hospital in Istanbul. He specializes in gastroenterology surgery and complex weight loss procedures. He completed a prestigious fellowship in gastroenterology surgery at the Türkiye High Specialization Hospital.

• Performs advanced bariatric surgeries including gastric bypass and sleeve gastrectomy.
• Treats complex gastrointestinal conditions such as pancreatitis, Crohn's disease, and cirrhosis.
• Expert in endoscopic sleeve gastroplasty (ESG) and laparoscopic anti-reflux surgery.
• Works at Medipol Acibadem, a JCI-accredited facility using the da Vinci robotic system.

Dr. Osman Aktas is a general surgeon at Avicenna International Hospital in Istanbul. He completed laparoscopic surgery training in Germany. He specializes in oncological and metabolic surgeries. Dr. Aktas previously served as chief physician at several prominent military hospitals.

• Performs complex cancer surgeries like the Whipple procedure and colorectal resections.
• Treats obesity and diabetes using metabolic surgery techniques.
• Manages gastrointestinal tumors and obstructions through minimally invasive methods.
• Uses laser therapy for modern treatment of anal diseases.

Dr. Gokhan Yilmaz is a general surgeon at Medipol University Pendik Hospital in Istanbul. He specializes in colorectal, gastrointestinal, and bariatric surgery. Dr. Yilmaz previously served as an Assistant Professor at Istanbul Medipol University. He trained at Okmeydanı Training and Research Hospital, a top Turkish medical institution.

• Performs complex procedures like gastric sleeve, gastric bypass, and gastric balloon.
• Treats conditions including inguinal hernias, pancreatic cysts, and fibrocystic breast disease.
• Conducted surgical research and trained new surgeons as a university faculty member.
• Works at a facility that earned 95.4 out of 96.4 points for healthcare quality.

Dr. Ayşe İrem Yasin is a medical oncologist at Medipol Acıbadem District Hospital in Istanbul. She holds a prestigious ESMO Board Certificate. Dr. Yasin specializes in solid tumors, including breast, lung, and gastrointestinal cancers. She treats complex cases such as Merkel cell carcinoma and cancers of unknown primary.

• Trained at Harvard Medical School, Cleveland Clinic, and Basel University Hospital.
• Completed a clinical observership at the Breast Cancer Unit in Novara, Italy.
• Treats brain and CNS malignancies, soft tissue sarcomas, and urologic cancers.
• Works at a JCI-accredited facility equipped with the da Vinci robotic system.

Dr. Atakan Topcu is a medical oncologist at Medipol Acibadem District Hospital in Istanbul. He specializes in treating solid tumors including lung, breast, and colorectal cancers. Dr. Topcu is an Associate Professor with over 50 peer-reviewed scientific publications. He sits on the Editorial Board of the medical journal BMC Cancer.

• Expertise in immunotherapy, targeted therapies, and geriatric oncology care.
• Treats cancer-related malnutrition, cachexia, and sarcopenia.
• Maintains active membership in the European Society for Medical Oncology (ESMO).
• Works at a JCI-accredited hospital specializing in advanced oncology treatments.

Dr. Meryem Keceli Basaran is an Associate Professor and pediatric gastroenterologist at Biruni University Hospital. She specializes in digestion, hepatology, and nutrition for children. Dr. Basaran is a member of ESPGHAN, the European authority on pediatric gastroenterology. She manages gastrointestinal food allergies and inflammatory conditions like Crohn’s disease. She works at a TEMOS-accredited university hospital in Istanbul.

• Specializes in care before and after liver transplantation.
• Treats irritable bowel syndrome, celiac disease, and ulcerative colitis.
• Expert in managing chronic diarrhea, malabsorption, and faecal incontinence.
• Performs specialized diagnostic colonoscopies and gastroscopies with biopsy.

Dr. Omer Dogru is a pediatric hematologist and oncologist at Biruni University Hospital in Istanbul. He specializes in bone marrow transplantation and childhood cancer treatments. Dr. Dogru is an active member of the European Bone Marrow Transplantation (EBMT) society.

• Performs autologous, allogenic, and haploidentical stem cell transplantations for children.
• Treats childhood solid tumors including neuroblastoma, Ewing's sarcoma, and Wilms tumor.
• Served as an Assistant Professor in the Department of Pediatrics at Marmara University.
• Practices at Biruni University Hospital, a TEMOS-accredited facility in Turkey.

Dr. Esra Demir is an internal medicine specialist at Medipol Acibadem District Hospital in Istanbul. She serves as a sub-investigator for major international clinical trials on Type 2 diabetes treatments. Dr. Demir specializes in managing irritable bowel syndrome, thyroid diseases, and diabetes lifestyle changes. She works at a JCI-accredited facility equipped with interventional radiology and robotic systems.

• Led research for cardiovascular outcomes of Semaglutide in diabetic patients.
• Assisted in the SCALE Insulin study for overweight patients with Type 2 diabetes.
• Treats metabolic conditions including anemia, vitamin deficiencies, and adrenal adenomas.
• Performs specialized treatments such as intravenous vitamin C therapy.

Dr. Turkan Ozturk Topcu is a clinical oncologist at Biruni University Hospital in Istanbul. She maintains professional ties with the MD Anderson Cancer Center in the USA. She specializes in the treatment of breast, lung, and gastrointestinal cancers. Dr. Topcu is a member of both ESMO and ASCO.

• Completed a fellowship at the Sunnybrook Odette Cancer Center Breast Clinic in Canada.
• Treats a wide range of conditions including liver, pancreatic, and gynecological cancers.
• Held clinical roles at major institutions like Moffitt Cancer Center in the USA.
• Works at Biruni University Hospital, a TEMOS-accredited facility in Turkey.

Prof. Dr. Abdullah Sakin is a professor of medical oncology. He treats solid tumors, including lung, breast, gastrointestinal, genitourinary, gynecologic, head and neck cancers, and melanoma.

He delivers personalized, evidence-based care. His treatments include chemotherapy, targeted therapy, immunotherapy, hormone therapy, and precision oncology. He has authored more than 200 scientific publications and takes part in international clinical research. This work advances patient-centered cancer care.

Prof. Dr. Gül Alço is a radiation oncologist with about 27 years of experience. She treats breast, lung, prostate, gastrointestinal, gynecologic, central nervous system, head and neck, soft tissue, and bone cancers with radiotherapy.

Her expertise includes adaptive radiotherapy and radiosurgery. She uses advanced radiation techniques to provide personalized, evidence-based care in a multidisciplinary, patient-centered setting.

Assoc. Prof. Orhan Ünal Zorba, MD, is a urologist focused on andrology and endourology. He has about 25 years of experience. He currently sees patients at Private TUSA Hospital. He started there on 8 June 2026.

His academic work includes 29 international and 13 national publications and 7 book chapters. He has given at least 9 presentations at international congresses. His studies have been presented at EAU, ESSM, ICS, and EULIS meetings. He served as Assistant and Associate Professor of Urology from 2009 to 2016. He is a member of the Istanbul Medical Chamber, the Turkish Association of Urology, the Turkish Society of Andrology, and the Eastern Black Sea Association of Urologists.

Key areas include male infertility (micro‑TESE; outcomes in 191 patients with non‑obstructive azoospermia), microsurgical varicocele repair, prostate surgery (HoLEP, TURP), endoscopic stone surgery (URS, PCNL), and uro‑oncology. He speaks English.

Dr. Nihat Okcu is a gastroenterologist and gastrointestinal surgeon at Medipol University Pendik Hospital. He specializes in the treatment of complex digestive conditions and liver diseases. Dr. Okcu has published over 20 academic papers on gastric cancer and endoscopic diagnosis. He serves at a hospital with a 95.4% healthcare quality score.

• Performs laparoscopic anti-reflux surgery and small intestine resections.
• Expert in gastric polyps removal and duodenal polyp excision.
• Treats chronic conditions like cirrhosis, Crohn’s disease, and ulcerative colitis.
• Provides diagnostic gastroscopy with biopsy and ultrasound-guided procedures.

Dr. Mehmet Ali Gok is an Associate Professor of General Surgery at Medipol University Pendik Hospital. He specializes in laparoscopic hernia repair and metabolic surgery. Dr. Gok has authored over 20 national and international scientific articles on surgical outcomes. He practices at a hospital with 95.4 out of 96.4 healthcare quality points.

• Certified in robotic colorectal surgery and laparoscopic hernia techniques on cadavers.
• Received specialized training from the European Hernia Society in Dubai.
• Served as a former Chief Physician at Silopi State Hospital.
• Editor of several medical books on oncological, hernia, and minimal invasive surgery.