Tumor Marker Blood Test Doctors Abroad — Page 8

Dr. Rafet Eren is a hematologist at Biruni University Hospital in Istanbul. He specializes in treating leukemia, lymphoma, and myeloma. Dr. Eren is an Associate Professor with around 50 scientific publications in international journals. He received the Young Researcher Award from the Turkish Society of Hematology.

• Performs bone marrow transplants and haploidentical stem cell transplantation.
• Provides CAR T-cell therapy and biological treatments for blood cancers.
• Member of the European Society of Hematology and the Turkish Hematology Association.
• Works at Biruni University Hospital, a TEMOS-accredited facility in Turkey.

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.

Dr. Senem Karabulut is a medical oncologist at Biruni University Hospital in Istanbul. She is a professor and holds a PhD in molecular oncology. Dr. Karabulut is certified by the European Society for Medical Oncology (ESMO) Board. She previously trained as an observer at University Hospital in New Jersey, USA.

• Specializes in immunotherapy and targeted treatments for gastrointestinal and breast cancers.
• Treats hepatobiliary system tumors, lung cancer, and genitourinary malignancies.
• Qualified by the Turkish Medical Oncology Society Board Exam.
• Practices at Biruni University Hospital, a TEMOS-accredited facility.

The doctor is a highly experienced medical professional with over two decades of clinical practice. Having completed medical training at Istanbul University's Faculty of Medicine in 1996, the doctor went on to specialize at the SSK Okmeydanı Training and Research Hospital in 2000.

Throughout a distinguished career, the doctor has held positions at various reputable institutions, including the Kayseri Military Hospital, SSK Yalova Regional Hospital, and Private Avicenna Umut Hospital. Most recently, the doctor has contributed expertise to Private Adatıp Kurtköy Hospital and Istanbul Medipol University Pendik Hospital, demonstrating a consistent commitment to patient care and clinical excellence across multiple healthcare settings.

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.

Professor Eckhart Weidmann heads the hematology department at Nordwest Clinic. He specializes in blood disorders and uses tumor marker blood tests for cancer detection.

• Leads the hematology sector at a major German medical center
• Specializes in treating non-Hodgkin lymphoma and other blood cancers
• Focuses on precision diagnostics for blood-related conditions
• Authorized to practice medicine at the highest level of academic rank

Dr. Ugur Yayla is an ophthalmologist at Medipol University Pendik Hospital in Istanbul. He specializes in vitreo-retinal surgery and treats complex conditions like retinopathy of prematurity. Dr. Yayla completed a specialized fellowship in medical retina at Gazi University. He works at a center that serves over 350,000 patients annually.

• Performs retinal detachment surgery and retinopathy of prematurity (ROP) procedures.
• Specializes in cataract surgery with IOL replacement and multifocal lens implants.
• Provides laser vision correction including LASIK, LASEK, and SmartSight techniques.
• Treats glaucoma using laser trabeculoplasty and surgical intervention.

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

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. Siegbert Rossol is a Fellow of the European Board of Gastroenterology. He leads medical services at Nordwest Clinic in Frankfurt where tumor marker blood tests support cancer diagnostics.

• Received the prestigious Alexander von Humboldt Scholarship for his medical research
• Completed advanced hepatology training at King's College School in London
• Specializes in removing cancerous tissue using EMR and ESD minimally invasive methods
• Holds a Master of Science in Health Management from Mannheim and Heidelberg universities
• Member of the American Association for the Study of Liver Diseases

Associate Professor Ayse Irem Yasin is a certified medical oncologist at Medipol Acibadem District Hospital. She uses tumor marker blood tests to identify and track diverse cancer types.

• Holds an ESMO Board Certificate from Paris – a prestigious European oncology qualification
• Completed a specialized breast cancer unit observership at Maggiore della Carita Hospital in Italy
• Trained at world-renowned institutions including Cleveland Clinic and Harvard Medical School
• Specializes in complex cases like cancer of unknown primary and soft tissue sarcomas

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.

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. Kadri Yamac is an internist and hematologist. He earned his medical degree from Ankara University Faculty of Medicine (1976–1982). He completed Internal Medicine training at Gazi University Faculty of Medicine (1984–1989). He then completed a Hematology subspecialty at Gazi University Faculty of Medicine (1990–1993). He became an Associate Professor at Gazi University Faculty of Medicine in 1995. He was promoted to Professor in 2002.

Medical interests: anemias, coagulation disorders, hemochromatosis, chronic lymphocytic leukemia, lymph node diseases, non-Hodgkin lymphoma, Hodgkin lymphoma.

Prof. Dr. İbrahim Doğan is a gastroenterologist. He earned his MD from Ankara University Faculty of Medicine in 1991. He became an Internal Medicine specialist at Gazi University in 1996. He completed gastroenterology subspecialty training at İnönü University in 2001.

His academic career was at Gazi University. He served as Lecturer (2002), Assistant Professor (2003), Associate Professor (2007), and Professor (2012). He worked as a researcher at the University of California San Diego from 2004 to 2006. He has practiced at Koru Hospital since January 2023.

Clinical focus includes gastroesophageal reflux, irritable bowel syndrome, constipation, gastroparesis, achalasia, bloating, gas and belching, fecal incontinence, ulcerative colitis, and Crohn’s disease. He performs ERCP, stent placement, balloon and bougie dilation, polypectomy, argon plasma coagulation, double-balloon enteroscopy, and bleeding control.

Prof. Dr. Suna Emir graduated from Hacettepe University Faculty of Medicine in 1989. She completed her pediatrics residency at Hacettepe University from 1990 to 1995. In 2001, she finished her pediatric oncology subspecialty at the Hacettepe University Oncology Institute. She became an Associate Professor in 2004. From 2004 to 2009, she worked at Ankara Dışkapı Children's Health and Diseases Training and Research Hospital and founded the Pediatric Oncology Clinic there. In 2009, she served as Deputy Chief of Pediatric Oncology. From 2009 to 2016, she was a pediatric hematology–oncology training officer at the Ankara Children's Health and Diseases Hematology–Oncology Training and Research Hospital. Since 2019, she has been a Professor and founding faculty member in Child Health and Diseases at Atilim University.

She is an expert in general pediatrics and pediatric hematology–oncology. She is active in residency and subspecialty training. Her clinical interests include childhood diseases from birth to 18 years, lymphoma, solid tumors, autologous bone marrow transplantation, anemia, bleeding disorders, hereditary blood diseases, hemangiomas and other benign tumors, and enlarged lymph nodes.

Dr. Didem Tastekin is a medical oncologist at Biruni University Hospital in Istanbul. She specializes in breast and lung cancer treatment, including stage 4 cases. Dr. Tastekin received the TUBITAK Incentive Award for her work in cancer research. She is an active member of both ESMO and ASCO.

• Awarded Best Researcher of the Year at Istanbul University Oncology Institute.
• Treats complex cases at a TEMOS-accredited university hospital.
• Coordinates oncological check-ups and screenings for both men and women.
• Expert in diagnostics including PET-MRI, tumor markers, and organ biopsies.