Best Tumor Marker Blood Test Doctors Abroad

Dr. Elad Jacoby is a pioneer of pediatric CAR T–cell therapy in Israel. He heads the Pediatric Cell Therapy Center at Sheba Medical Center. Dr. Jacoby specializes in treating relapsed and high-risk pediatric leukemias and lymphomas. He completed fellowships at Johns Hopkins and the U.S. National Cancer Institute.

• Medical Director of the Advanced Biotherapy Center at Sheba Medical Center.
• Authored over 240 scientific publications in pediatric hemato-oncology.
• Board-certified in both Pediatrics and Pediatric Hematology and Oncology.
• Leads the integration of CAR T–cell therapy with bone marrow transplantation.

Dr. Avichai Shimoni is the Director of Bone Marrow Transplantation at Sheba Medical Center. He treats complex blood cancers. He completed a specialized fellowship at the MD Anderson Cancer Center. Dr. Shimoni uses allogeneic and autologous transplants for high-risk patients. He is a professor and Chairman of Hematology at Tel Aviv University.

• Named among Israel’s Best Doctors by Forbes for 2025 and 2026.
• Authored over 250 scientific papers on cellular therapies and transplantation.
• Provides CAR T-cell therapy for leukemia, lymphoma, and multiple myeloma.
• Works at Sheba Medical Center, a top-10 hospital globally per Newsweek.

Dr. Joseba Rebollo Liceaga is a clinical oncologist at Quirónsalud Alicante. He focuses on personalized cancer treatments and gene-based therapies for metastatic breast cancer. Dr. Rebollo Liceaga teaches as a professor of Multidisciplinary and Personalized Oncology. He treats various conditions, including prostate, colon, and thyroid cancers.

• Former Head of Oncology at Clínica San Miguel and Hospital General de Villalba.
• Researches electrochemotherapy and multidisciplinary approaches for complex cases.
• Practices at JCI-accredited Quirónsalud Torrevieja, a leading center in southeastern Spain.
• Expert in diagnostics using PET-CT, mammography, and tumor marker blood tests.

Dr. Kim Taegyun is a gastroenterologist. He focuses on pancreatobiliary diseases and cancers, including pancreatitis, pancreatic cysts and cancer, cholecystitis, gallstones (cholelithiasis), and biliary tract cancer. He also performs advanced endoscopy, including ERCP. He treats gastrointestinal tumors, stomach and colon polyps, stomach cancer, and submucosal tumors (SMT).

Education and training: MD, Jeonbuk National University College of Medicine. MS in Medicine, University of Ulsan. Internship, Jeonbuk National University Hospital. Residency in Internal Medicine, Veterans Health Service Medical Center. Fellowships in Gastroenterology, Inje University Haeundae Paik Hospital and Asan Medical Center.

Career: Attending physician and specialist at Gwangju Veterans Hospital and the Veterans Health Service Medical Center.

Dr. Pak Seongjin is a gastroenterologist. He focuses on endoscopy and advanced procedures such as gastroscopy, colonoscopy, polypectomy, and ESD. He also treats digestive and liver diseases, including cirrhosis, pancreatitis, hepatitis, and Helicobacter pylori infection.

He earned his M.D. and M.S. in Internal Medicine from Chung-Ang University. He completed his internal medicine residency and a gastroenterology fellowship at Chung-Ang University Hospital.

He is a clinical professor at Gachon University College of Medicine and Inha University College of Medicine. He is a full member of the Korean Association of Internal Medicine, the Korean Society of Gastrointestinal Endoscopy, the Korean Gastroenterology Association, and the Korean Pancreatobiliary Association.

Dr. Hila Magen is a leading Israeli hemato-oncologist at Sheba Medical Center. She heads the Multiple Myeloma and Amyloidosis Unit. Dr. Magen specializes in treating complex plasma cell disorders and high-risk myeloma. She is a principal investigator for innovative point-of-care CAR-T therapy programs. Her work brings advanced immunotherapies into routine clinical care.

• Authored over 100 scientific publications and landmark myeloma studies.
• Completed fellowships at MD Anderson and University of Arkansas for Medical Sciences.
• Performs CAR-T cell therapy and bone marrow transplantations.
• Works at Sheba Medical Center, ranked 7th worldwide in 2026 by Newsweek.

Dr. Shute Ailia DAE is a medical oncologist at Optimed International Çorlu Hospital. Dr. Ailia graduated from Dokuz Eylül University Faculty of Medicine in 2013 and completed an internal medicine residency at Bezmialem Vakıf University Hospital in 2018. A hematology–oncology fellowship at Başkent University Hospital followed in 2023.

From 2018 to 2020, Dr. Ailia served as an internal medicine specialist at Bezmialem Vakıf University Hospital. From 2023 to 2024, Dr. Ailia was an instructor in medical oncology at Başkent University Adana Dr. Turgut Noyan Practice and Research Center.

Clinical focus includes breast, lung, and prostate cancers. It also covers gastrointestinal cancers (colon, stomach, esophagus, pancreas, liver), lymphomas, melanoma, and gynecologic and genitourinary cancers. Languages: English, Turkish, Swahili.

Professor Schoppmann heads the Gastroesophageal Tumor Unit at Vienna General Hospital. He specializes in the surgical treatment of gastric and esophageal cancers.

• Coordinates tumor marker blood test screening for gastrointestinal cancers
• Published over 240 specialized articles in major medical journals
• Directs surgical functional testing to evaluate digestive system performance
• General Secretary of the Austrian Society of Surgical Oncology
• Associate Professor of Surgery at the Medical University of Vienna

Professor Kim Tae Joong is a specialist in gynecologic oncology at Samsung Medical Center. He uses tumor marker blood tests to detect and monitor reproductive cancers.

• Serves as a professor at Sungkyunkwan University School of Medicine
• Expert in identifying biomarkers for gynecologic malignancies
• Focuses on minimally invasive approaches for female reproductive health
• Member of the Korean Society of Gynecologic Oncology

Dr. Ofer Spielberg is an expert oncohematologist at Assuta Medical Center. He specializes in the blood disorders and cancers found during tumor marker blood tests.

• Practices at Assuta Medical Center – Israel's largest private healthcare provider
• Expert in hematology – the study and treatment of blood-related diseases
• Focuses on identifying cancer cells and abnormalities in blood samples

Jacob Cohen is a gynecologist at Assuta Medical Center. He specializes in endoscopic and laparoscopic operations to treat female reproductive health issues.

• Performs minimally invasive procedures to view and treat internal organs
• Specialist in gynecological surgery for complex cases
• Works at Assuta Medical Center, a leading private hospital in Israel

Dr. Choi Han Yong leads the Urology Department at Samsung Medical Center. He specializes in identifying urological cancers through advanced diagnostic assessments.

• Heads the oncology and urology wing at a world-renowned medical center
• Focuses on the detection of prostate and bladder malignancies
• Specialist oncosurgeon with expertise in laboratory screening results
• Integrates blood test findings into personalized surgical planning

Dr. Ella Tepper serves as the Chief Physician of the Oncology Center at Assuta Medical Center. She specializes in oncology and oversees critical diagnostic screenings like the tumor marker blood test.

• Leading oncologist at Israel's largest private hospital
• Expert in identifying blood-based signs of cancer growth
• Heads the oncology department to ensure diagnostic accuracy
• Coordinates oncology care for international patients

Dr. Zulfu Sertkaya is an associate professor and andrologist at Andro Expertise in Istanbul. He holds the FEBU title from the European Association of Urology. Dr. Sertkaya focuses on male health, sexual function, and aesthetic urological procedures. He treats patients at his clinic and performs surgeries at affiliated hospitals.

• Earned Fellow of the European Board of Urology (FEBU) status.
• Specialize in andrology, male sexual health, and aesthetic urology.
• Performs penile implant surgery and varicocelectomy for infertility.
• Works at a clinic accredited by the Turkish Medical Association.

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. Mehmet Besir Surme is a neurosurgeon at Eskişehir City Hospital in Turkey. He specializes in pediatric neurosurgery and complex brain tumor removal. Dr. Surme completed an international fellowship in pediatric neurosurgery in Rome, Italy. He has authored scientific publications with over 40 citations in his field.

• Performs craniotomy, shunt surgeries for hydrocephalus, and brain cyst removal.
• Treats Arnold Chiari syndrome and spinal stenosis using surgical techniques.
• Expertise in deep brain stimulation for Parkinson's disease and spinal cord stimulation.
• Uses 3D-printed molds for customized cranioplasty procedures.

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. Rafail Ibayev is a gastrointestinal surgeon at Erdem Hospital in Istanbul. He is a pioneer in minimally invasive and metabolic surgery. Dr. Ibayev performs laparoscopic procedures for stomach, intestine, and rectal diseases. He has extensive experience in weight management surgery, including sleeve gastrectomy and gastric bypass. Dr. Ibayev also treats endocrine and breast conditions using oncoplastic techniques.

• Specializes in bariatric surgery and metabolic health improvements.
• Performs complex operations for liver, stomach, and colorectal tumors.
• Uses laparoscopic techniques to reduce scarring and speed up recovery.
• Works at Erdem Hospital, which treats 200,000 patients every year.