Best Tumor Marker Blood Test Doctors Abroad

Dr. Elnur Sahibov is a radiation oncology specialist at Emsey Hospital. He provides expert oversight for tumor marker blood test screenings.

• Completed specialization training at Marmara University Faculty of Medicine
• Trained in radiation oncology to identify and track cancer markers
• Practices at the JCI-accredited Emsey Hospital in Istanbul

Professor Birol Baytan leads pediatric hematology at Emsey Hospital. He uses tumor marker blood tests to track childhood cancers and blood disorders.

• Performed 950 bone marrow transplants for pediatric patients
• Treats solid tumors including neuroblastoma and brain tumors
• Specializes in CAR T-cell therapy and advanced immunotherapy
• Uses cytogenetic studies to identify genetic changes in cancer cells
• Published 15 articles in international medical journals

Dr. Nail Paksoy is an associate professor of medical oncology at Medipol Bahçelievler Hospital. He is board-certified by the European Society for Medical Oncology (ESMO). Dr. Paksoy specializes in lung, breast, and gastrointestinal cancers. He uses modern immunotherapy and targeted therapy protocols. His clinic is JCI-accredited for high safety standards.

• Served as a subinvestigator in over 8 international clinical trials for Roche and Pfizer.
• Authored over 40 research articles in journals indexed by SCI and SSCI.
• Completed dual fellowships in allergy-immunology and medical oncology.
• Treats complex sarcomas and renal cell carcinomas with systemic therapies.

Dr. Cubillo Gracián pioneered the liquid biopsy program in Spain. He uses this specialized tumor marker blood test for molecular analysis without invasive surgery.

• Heads the Medical Oncology Service at Hospital Universitario HM Sanchinarro
• Directs postgraduate research and the Master's in Clinical and Applied Research in Oncology
• Uses molecular markers like EGFR and ALK to design targeted cancer treatment plans
• Co-investigator for the Start Madrid clinical trials program developing new cancer therapies
• Associate Professor of Oncology teaching pathology and bioethics at USP CEU

Dr. Chaitainya Borde has handled over 30,000 PET scans at HCG Manavata Cancer Centre. He is a specialist in nuclear medicine and advanced diagnostic imaging.

• Expert in nuclear scans used alongside tumor marker blood tests for cancer staging
• Managed care for over 1,000 thyroid cancer patients using specialized diagnostic protocols
• Proficient in nuclear cardiology services and complex metabolic imaging
• Author of multiple research papers published in recognized medical journals
• Specializes in Lu-177 RN therapies for targeted cancer treatment

Dr. Sridhar P.S. is a radiation oncology expert at HCG Manavata Cancer Centre. He focuses on radiotherapy and tumor marker blood test screening.

• Holds a Doctor of Medicine in radiotherapy from Banaras Hindu University
• Diplomate of the National Board in radiotherapy oncology
• Member of the Association of Radiation Oncology of India
• Member of the Society for Neuro-Oncology for brain tumor care
• Bachelors degree in medicine from Mysore University

Professor Kayihan Engin is the Director of Oncological Sciences at Medicana Bursa Hospital. He manages tumor marker blood test results within complex cancer treatment programs.

• Completed a post-doctoral fellowship at Thomas Jefferson University in the USA
• Former Coordinator of Oncological Sciences at Anadolu Medical Center in affiliation with Johns Hopkins
• Conducted cancer risk research at the National Cancer Institute in Bethesda
• Specializes in gastrointestinal, gynecological, and brain tumors
• Previously served as Chairman of Radiation Oncology at Uludağ University Medical College

Professor Metin Demirkaya leads pediatric oncology at Medicana Bursa Hospital. He specializes in identifying and treating childhood cancers through precise tumor marker blood tests.

• Treats neuroblastoma, leukemia, and Ewing's sarcoma in children
• Uses PET-CT imaging to detect and stage solid tumors
• Performs bone marrow biopsies for detailed blood disorder analysis
• Installs PORT-A-CATH systems – subcutaneous devices for simpler long-term treatment access
• Former associate professor at Bursa Uludag University School of Medicine

Professor Tolga Akman leads urological oncology at Medicana Bahcelievler Hospital. He uses tumor marker blood tests to monitor prostate, bladder, and kidney cancers.

• Professor of Medicine at a leading Turkish university-affiliated hospital
• Specializes in laparoscopic urology for minimally invasive surgical treatment
• Performs both radical and partial nephrectomies for kidney cancer care
• Expert in microsurgical procedures and pediatric urological surgeries
• Trained at Istanbul University School of Medicine in surgical urology

Professor Adil Baykan is a senior surgeon at Medistate Hospital Istanbul. He specializes in oncological surgery and identifying gastrointestinal tumors through marker tests.

• Trained at the Mayo Clinic in the USA for advanced colorectal surgery
• Practiced at St. Marks Hospital in London to master specialized surgical techniques
• Senior Professor at Ankara University medical faculty – teaches new generations of surgeons
• Published numerous research articles on colon cancer in global medical journals
• Specializes in laparoscopic surgery – using small incisions for faster patient recovery

The doctor is a highly experienced specialist in the field of neurosurgery, with a focus on advanced surgical techniques for treating complex brain and spinal disorders. With over 15 years of clinical experience, the doctor has performed numerous successful surgeries, contributing significantly to the field through innovative approaches and patient-centered care.

Graduated from a prestigious medical school and completed rigorous residency and fellowship programs. The doctor is board-certified and has published extensively in peer-reviewed journals, sharing insights and advancements in neurosurgical procedures.

Dr. Zavoloka has performed 8,000 successful surgeries and maintains a dual focus on surgical oncology and tumor marker blood test analysis.

• Heads the oncology and surgery departments at Patlazhan Clinic in Odesa
• Holds seven patents for innovative clinical techniques and surgical methods
• Treats complex conditions including breast cancer, sarcoma, glioma, and melanoma
• Defended a medical thesis as a Candidate of Medical Sciences
• Shared expertise at the ISAPS Congress in Miami and Japan

Dr. Svetlana Sobol is a specialist in gynecology and endocrinology at ON Clinic Kharkiv. Her work includes screening for female reproductive health through tumor marker blood tests.

• Holds a second qualification category in obstetrics and gynecology
• Graduated from Kharkiv National University named after V. N. Karazina
• Expert in gynecologist-endocrinology – the study of hormones and pelvic health
• Regularly shares medical expertise on the Healthspace YouTube channel
• Completed numerous professional training courses in women's diagnostic health

Dr. Lopez Ibor leads the Pediatric Hematology and Oncology Unit at HM Montepríncipe. She uses tumor marker blood tests to track pediatric cancers and hematological diseases.

• Trained in pediatric hematology at the University of Maryland in the United States
• Specializes in treating neuroblastoma, leukemia, and solid tumors in children
• Uses intraarterial chemotherapy to deliver drugs directly to tumor sites
• Author of numerous scientific publications in international medical journals
• Directs CAR T-cell therapy programs for children with blood cancers

The doctor is a highly qualified specialist in Obstetrics and Gynecology, having completed medical training at the Istanbul University Cerrahpaşa Faculty of Medicine in 2008. With over a decade of clinical experience, the doctor has served in various healthcare settings, including Medipol University, Private Nisa Hospital, and Kaman State Hospital.

Throughout a distinguished career, the doctor has demonstrated a commitment to women's health and reproductive medicine, providing comprehensive care across diverse hospital environments since 2008.

10,000 major surgeries performed – Dr. Lalit Banswal is a surgical oncologist and Assistant Professor at the State Cancer Institute. He uses tumor marker blood tests alongside advanced imaging to help monitor gastrointestinal cancers.

• Trained at the prestigious Tata Medical Center in Kolkata
• Specializes in robotic and laparoscopic surgeries for stomach and colon cancer
• Serves as a lead investigator for gastrointestinal oncology research projects
• Fellowship trained in surgical oncology from Tata Medical Centre
• Author of multiple publications in international medical journals

Dr. Shaunak Valame studies the molecular basis of cancer to guide treatment decisions. He applies this research to tumor marker blood test results at HCG Manavata Cancer Centre.

• Earned DNB in Medical Oncology from the prestigious Indraprastha Apollo Hospital
• Presented stomach cancer research at the American Society of Clinical Oncology symposium
• Member of ASCO, the world leading organization for cancer specialists
• Delivered lectures at the International Winter School of Oncology at AIIMS
• Focuses on molecular mechanisms for targeted therapy in solid and pediatric tumors

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. Natalya Shevchenko is a gastroenterologist of the highest category with 67 positive patient reviews. She practices at ON Clinic Kharkiv, which treats over 72,000 patients every year.

• Evaluates tumor marker blood tests to detect early signs of gastrointestinal cancers
• Expert in transcribing complex diagnostic studies and laboratory analyses
• Specializes in chronic digestive conditions like Barrett's esophagus and GI tract polyps
• Coordinates advanced diagnostics including CT scans and gastroscopy with biopsy
• Trained at Kharkiv National Medical University in various gastroenterological screenings