Best Tumor Marker Blood Test Doctors Abroad

Dr. Manuela Seifert heads the Breast Cancer Center at Academic Hospital Solingen. She integrates tumor marker blood tests into early diagnostics and aftercare for breast diseases.

• Specializes in breast cancer diagnostics using 3D mammography and high-precision ultrasound
• Member of the German Society of Senology – experts in breast health and disease
• Performs sentinel lymph node biopsies to check for the spread of cancer
• Trained at Heinrich-Heine-University – one of Germany's most established medical faculties
• Directed the specialized Breast Clinic in Solingen as head physician since 2016

Dr. Hana Golan heads the Pediatric Hemato-Oncology and Bone Marrow Transplantation Division at Sheba Medical Center. She specializes in high-risk pediatric tumors and complex childhood cancers. Dr. Golan serves as the principal investigator for the High-Risk Neuroblastoma ESIOP protocol. She practices at a hospital ranked among the global top 10 by Newsweek.

• National coordinator of multicenter oncology protocols and international Phase I/II clinical trials.
• Performs bone marrow transplants and CAR T-cell therapy for pediatric patients.
• Expert in neuroblastoma, leukemia, and treatment-resistant malignancies.
• Senior Lecturer at the Sackler Faculty of Medicine at Tel Aviv University.

Professor Fabio Ciceri leads the Hematology and Bone Marrow Transplantation Unit at San Raffaele Research Hospital. He provides specialized tumor marker blood test services for precision cancer staging.

• Principal Investigator in cell and gene therapy for blood cancers
• Authored 180+ scientific papers in peer-reviewed medical journals
• Directs clinical trials for advanced hematological malignancies
• Member of the European Hematology Association (EHA)
• Heads the Blood Transfusion Centre at IRCCS San Raffaele

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. Zhang Rong Chun is a leading authority in digestive endoscopy. He serves as the Director of Gastroenterology at Xiamen Humanity Hospital.

• Specializes in detecting and treating gastrointestinal cancers through tumor marker blood test results
• Performs endoscopic tumor resection to remove growths without major surgery
• Serves on the Standing Committee for Digestive Endoscopy
• Expert in managing complex pancreatic and biliary diseases
• Previously held a senior role at the prestigious Xijing Hospital

Professor Luo Xiaoping is a nationally recognized interventional radiologist and a leading authority in Western China. He began pioneering vascular interventions in the early 1990s. He helped found the Interventional Group at the Second Affiliated Hospital of Chongqing Medical University.

He has completed over 100,000 interventional procedures, including about 4,000 complex cases. His key skills include TACE for hepatocellular carcinoma, Budd–Chiari interventions, TIPS, and single-stage bilateral stenting for hilar biliary obstruction, with success rates near 100%. He has been a master’s supervisor since 2007. He has trained many physicians, guided complex cases at more than 40 major hospitals across Western China, and helped build interventional programs. He has published 32 papers as first or corresponding author (22 CSCD core, 4 Chinese core, 6 CSCD extended).

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.

Professor Amit Tirosh heads the Neuroendocrine Tumors Service at Sheba Medical Center. He specializes in using tumor marker blood tests to track neuroendocrine cancer.

• Trained at the National Institutes of Health in endocrine tumor genetics
• Expert in managing hereditary syndromes like VHL and MEN1
• Author of 40+ peer-reviewed articles in journals like Radiology and JAMA
• Member of an international expert panel for von Hippel-Lindau disease
• Leads the Endocrine Oncology Bioinformatics Laboratory for advanced tumor research

Dr. Zvi Cohen is the Director of the Neurosurgery Department at Sheba Medical Center. He was recently recognized in Forbes Israel’s Best Doctors list for 2025. Dr. Cohen specializes in treating complex brain, pituitary, and spinal cord tumors. He founded the brain tumor tissue bank at Sheba to support oncological research. Dr. Cohen is board-certified in neurosurgery and leads clinical trials for malignant brain tumors.

• Completed fellowships in neurosurgical oncology at MD Anderson and neuroradiology at Beth Israel.
• Expert in intraoperative MRI, stereotactic biopsies, and image-guided resections.
• Performs radiosurgery and minimally invasive microsurgery for CNS tumors.
• Member of the Society for Neuro-Oncology and the Israeli Association of Neurological Surgeons.

Dr. Dov Zippel is a surgical oncologist and head of the Meirav Breast Center. Forbes Israel named him to its Best Doctors list in 2025. He treats benign and malignant breast tumors and melanoma at Sheba Medical Center. Dr. Zippel completed a surgical oncology fellowship at the University of Calgary in Canada.

• Performs breast-conserving surgery and minimally invasive skin cancer procedures.
• Treats patients at the Ella Lemelbaum Institute for Immuno-Oncology.
• Researches perioperative treatments for stage III melanoma and breast lesion excision.
• Works at Sheba Medical Center, ranked 7th worldwide by Newsweek in 2026.

Dr. Almog Ben Yaacov is a senior surgeon at Sheba Medical Center specializing in surgical oncology. He uses tumor marker blood tests to manage complex gastrointestinal and abdominal cancers.

• Trained at Memorial Sloan Kettering Cancer Center in New York
• Performed over 200 HIPEC procedures – a specialized chemotherapy treatment for abdominal cancers
• Board certified in both general surgery and surgical oncology
• Graduated with honors from Semmelweis University Medical School
• Published research on intraoperative findings for patients with peritoneal malignancies

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).

Professor Xiao Yueyong is Chief Physician in the Department of Radiological Diagnosis at the Chinese PLA General Hospital. He is a leading expert in minimally invasive interventional oncology. He serves as the inaugural President of WATA (2025–). He is President of the International (2020–) and Asian (2012–) Societies of Cryotherapy. He is also Deputy Head of the NHC Expert Group on tumour ablation regulations (2009–).

He has performed over 100,000 CT/MRI‑guided minimally invasive procedures. His work covers chemical ablation, RFA, MWA, cryoablation, and NanoKnife (IRE). He introduced and advanced NanoKnife ablation in China. He led the first national standards for tumour cryoablation and NanoKnife.

Honors include the National Special Contribution Award (Lifetime Honorary). He received First Prize from the Chinese Medicine Education Association (2021). He received two Second Prizes for Military Medical Achievements (2016, 2018) and two Second Prizes from the China Anti‑Cancer Association (2019, 2022). He was named Asian Ablation Master. His research record includes 13 Chinese patents. He is the principal investigator for four NSFC projects and one MOST subject. He has published over 200 papers, with over 110 as first or corresponding author and over 40 in SCI journals. He has led over 10 ablation guidelines or consensus statements.

Dr. Ding Yi is the Associate Chief Physician in Hematology at Shanghai Tongji Hospital. She is also the acting deputy director of the Blood Transfusion Department. She holds a Master of Medicine from Tongji University. She serves on the Youth Committee of the Shanghai Society of Hematology.

She is skilled in diagnosing and treating leukemia, lymphoma, and myeloma. She offers hematopoietic and umbilical cord blood stem cell therapies. She specializes in acute leukemia. She developed sequential treatment protocols. She participated in research that won the Second Prize of the Shanghai Science and Technology Progress Award. She has published more than 10 papers.

Dr. Sinan Karaaslan is a medical oncologist at Anadolu Medical Center. He uses tumor marker blood tests to monitor breast, colorectal, and urogenital cancers.

• Trained at Istanbul University – one of Turkey's most prestigious medical schools
• Former oncology expert at the Gülhane Military Medical Academy
• Specializes in systemic therapies including immunotherapy and targeted therapy
• Care focuses on lung, liver, pancreatic, and stage 4 colon cancers
• Member of the Turkish Medical Oncology Society and Turkish Lung Cancer Society

Dr. Tarik Akar is an award-winning specialist at Hisar Hospital Intercontinental. He focuses on the early detection and treatment of gastrointestinal cancers.

• Winner of the Best Verbal Presentation Award at the International Gastrointestinal System Cancers Congress
• Uses gastroscopy and colonoscopy with biopsies for precise tumor marker blood test follow-ups
• Performs ESD to remove early-stage esophageal and colon cancers without major surgery
• Published 25 research papers on digestive system disorders in international medical journals
• Member of the medical team at JCI-accredited Hisar Hospital Intercontinental

Professor Serkan Keskin ranked first in Turkey in the 2012 Medical Oncology Proficiency Exam. He currently leads oncology services at Memorial Şişli Hospital in Istanbul.

• Uses tumor marker blood tests to identify specific cell molecules for precise cancer detection
• Winner of the Best Poster Award at the 19th National Cancer Congress
• Specializes in immunohistochemistry to pinpoint cancer origins for gastrointestinal and breast cancers
• Active member of the American Society of Clinical Oncology (ASCO)
• Member of ESMO, the leading European body for medical oncology standards