Tumor Marker Blood Test Doctors Abroad — Page 2

Dr. Onder Surgit is a professor of general surgery at Optimed International Hospital. He is a surgical instructor at the Advanced Medical Technologies Training Center (ITEM). Dr. Surgit treats cancer, obesity, and complex gastrointestinal conditions. He applies laparoscopic techniques for weight loss and tumor removal.

• Specializes in bariatric surgery including gastric sleeve, bypass, and balloon procedures.
• Performs oncological surgeries for breast, lung, stomach, and colon cancer.
• Served as a faculty member at Turgut Ozal and Atilim Universities.
• Works at AACI-accredited Optimed International Hospital in Tekirdag, Turkey.

Professor Kim Jong-yeon is a gastroenterologist at Myongji Hospital. He treats diseases of the esophagus, stomach, colon, and liver, including cirrhosis and hepatitis. He performs therapeutic endoscopy, such as endoscopic polypectomy. He also serves as Deputy Director of the International Healthcare Center.

He is a member of the Liver Failure Center. He works with teams in hepatology, liver cancer, and transplantation to provide coordinated care for advanced liver disease and for transplant candidates.

MD, Jeonbuk National University College of Medicine. Clinical Professor of Gastroenterology at Myongji Hospital. Member of the Korean Association of Internal Medicine, the Korean Society of Gastroenterology, and the Korean Society of Gastrointestinal Endoscopy. Former resident and fellow at Inje University Ilsan Paik Hospital.

Dr. Ceyhun Bozkurt is a pediatric hematologist-oncologist at Medical Park Bahcelievler Hospital. He serves as the clinical director and vice director of the stem cell transplant unit. Dr. Bozkurt focuses on childhood leukemia, bone marrow transplants, and neuroblastoma. He completed specialized observerships at Harvard University and Cincinnati Children's Hospital.

• Member of the International Society of Pediatric Oncology (SIOP).
• Active member of the European Bone Marrow Transplant Group (EBMT).
• Published more than 40 articles on stem cell therapy and blood disorders.
• Works at a center performing the highest number of transplants in Turkey.

Dr. Ayshe Okumush is a radiation oncologist at Private NeoLife Medical Center. She earned her MD from Karadeniz Technical University in 2003. She completed a residency in radiation oncology at Sisli Etfal Training and Research Hospital from 2006 to 2011.

She served as a specialist at Diyarbakir Uckuyular Training and Research Hospital from 2011 to 2013 and at Sisli Etfal from 2013 to 2016. She then worked at Yeni Yuzyil University Private Gaziosmanpasa Hospital from 2016 to 2026. She joined NeoLife in 2026.

Memberships: Turkish Society for Radiation Oncology (TROD) and the European Society for Radiotherapy and Oncology (ESTRO). Clinical focus: SRS, SRT, SBRT; VMAT, IMRT; radiotherapy for head and neck, lung, and brain tumors; SGRT, TBI, and 3D brachytherapy.

Dr. Sezer Sağlam is a medical oncologist at Gayrettepe Florence Nightingale Hospital in Istanbul. He specializes in gastrointestinal oncology and the treatment of liver cancer. Dr. Sağlam was nominated for the International Best Researcher Award for his work on liver-transplanted patients. He has served as a professor of medical oncology since 2016.

• Member of the European Society for Medical Oncology (ESMO).
• Active member of the American Society of Clinical Oncology (ASCO).
• Member of the European Neuroendocrine Tumor Society (ENETS).
• Works at JCI-accredited facility with advanced PET-MRI and radiology departments.

Dr. Mehmet Salih Iyikesici is a medical oncologist. His work focuses on metabolically supported chemotherapy (MSCT), ketogenic diet–supported cancer care, hyperthermia, hyperbaric oxygen therapy, and insulin potentiation therapy. He emphasizes care for breast, pancreatic, and gastric cancers.

He is a Medical Oncology Specialist at Neolife Medical Center (2026–present). He previously served at Private Bahçelievler Medical Park (2013–2026), Medicana Beylikdüzü (2010–2013), Silivri Anadolu (2009–2010), Diyarbakır Training and Research (2008–2009), and Bursa Çekirge State (2006–2008). Earlier, he worked as an Internal Medicine Specialist (1997–2003). He was an Assistant Professor at Altınbaş University (2014–2026).

Training: Medical Oncology subspecialty, Marmara University (2003–2006). Internal Medicine, Istanbul Haydarpaşa Numune (1992–1996). Medicine, Uludağ University (1985–1990). Member, Medical Oncology Association (since 2004). His recent research (2019–2020) covers gastric, breast, pancreatic, and lung cancers. Topics include long‑term survival in metastatic pancreatic cancer and feasibility in metastatic non‑small cell lung cancer (NSCLC).

Dr. Sinan Karaaslan is a medical oncologist at Anadolu Medical Center in Istanbul. He specializes in treating breast, colorectal, and urogenital system cancers. Dr. Karaaslan brings clinical expertise from major institutions, including Medical Park and Gülhane Military Medical Academy. He works at a hospital affiliated with the Johns Hopkins Hospital.

• Holds personal certification from the European Society for Medical Oncology.
• Treats complex conditions, including stage 4 colon and lung cancers.
• Member of the Turkish Medical Oncology and Turkish Lung Cancer societies.
• Performs systemic therapies such as immunotherapy, targeted therapy, and chemotherapy.