Best Online Consultation with Oncologist Doctors Worldwide — TOP 115

Dr. Bulent Karagoz is a medical oncologist at Anadolu Medical Center in Istanbul. He specializes in immunotherapy and targeted therapies for sarcoma, lymphoma, and lung cancer. Dr. Karagoz provides treatment at a facility affiliated with the prestigious Johns Hopkins Hospital.

• Authored over 40 research publications focusing on tumor biology and immunology.
• Former Head of Internal Diseases at Istanbul Okan University Faculty of Medicine.
• Held leadership roles in medical oncology at GATA Haydarpasa Training Hospital.
• Member of the Turkish Medical Oncology Association and European Head and Neck Society.

Dr. Zafer Gulbas founded and directs Turkey’s largest Bone Marrow Transplant Center at Anadolu Medical Center. He is a hematologist-oncologist specializing in complex blood cancers and clotting disorders. Dr. Gulbas trained at top global institutions, including MD Anderson and Fred Hutchinson in the USA. He performs autologous and allogeneic transplants for leukemia, lymphoma, and aplastic anemia.

• Achieved an 81% success rate for autologous bone marrow transplants.
• Supervised over 3,000 successful transplant procedures since 2010.
• Authored over 260 scientific publications with 5,000+ citations in hematology.
• Member of the European Hematology Association and American Hematology Association.

Dr. Kemal Rasa is a general surgeon at Anadolu Medical Center in Istanbul. He is an editorial board member of the British Journal of Surgery. Dr. Rasa focuses on breast, pancreatic, and thyroid cancer surgeries. He also manages surgical infections and glucose metabolism disorders. His clinic partners with Johns Hopkins Medicine for American treatment standards.

• Former President of the Surgical Infection Society – Europe.
• Secretary of the World Surgical Infection Society board of directors.
• Authored over 65 national and international medical publications.
• Performs thyroidectomy, pancreatic enucleation, and breast cancer surgery.

Dr. Sertkaya graduated from Konya Meram Science High School in 2001 and entered Gazi University Medical Faculty the same year, graduating in 2008. He completed his urology specialization at Haydarpaşa Numune Training and Research Hospital in 2014, becoming a urology specialist.

Since becoming a specialist, he has focused on the sub-branch of Andrology, attending various training sessions and conferences and performing surgeries with some of the world's leading Andrology professors. In 2017, he passed the written and oral proficiency exams conducted by the European Association of Urology, earning the title of "FEBU."

In 2020, Dr. Sertkaya achieved the rank of Associate Professor of Urology. His journey in Urology and Andrology, which began in 2008, continues at the Andro Expertise Male Health and Aesthetics Center, which he founded in 2022. He sees patients in his own clinic and performs surgeries at affiliated hospitals.

Prof. Dr. M. Emre Üstündağ is a Professor of Otorhinolaryngology–Head and Neck Surgery at Anadolu Medical Center in Gebze. He has been a professor at Kocaeli University since 2006. He completed his MD and ENT residency at Istanbul University between 1983 and 1995. He has worked at Istanbul and Kocaeli universities and at Acıbadem hospitals. He has also maintained a private practice since 2006.

Clinical focus: head and neck oncology and surgery; rhinology and rhinoplasty; laryngology; septoplasty; sleep apnea surgery.

He completed international training in Ireland (Ardkeen). In Germany, he trained in Tübingen; Freiburg (otology, 4 months); and Regensburg (rhinology, 4 months). In the USA, he trained at Stanford in laryngology and sleep apnea (4 months). He has 47 international articles and 788 citations (Google Scholar, Jan 2026). He is a member of the Turkish ORL-HNS, the Istanbul University ENT Association, and the German ORL-HNS.

The doctor is a highly respected oncologist with extensive experience in a wide range of cancer treatments. She has significantly contributed to clinical research, particularly in understanding and improving patient attitudes towards clinical trials. Her clinical focus includes advanced procedures such as Hyperthermic Intraperitoneal Chemotherapy (HIPEC), SIRT therapy, and immunotherapy with Keytruda. The doctor also performs complex surgeries including Whipple surgery, liver resection, and pancreatic cancer surgery, demonstrating a comprehensive approach to oncologic care.

Doctor Brenda Pastrana is a mexican surgical Oncologist. 

Medical background.

Centro Medico Nacional 20 de Noviembre Issste, Surgical Oncologist in 2020.

Title by Universidad Autónoma de México UNAM.

Surgical Residency Instituto Mexicano del Seguro Social. 2015.

Title by Universidad de Quintana Roo. 

Board Certified by Conacem from 2020 to 2025 number 2171 

Board Certified by Conacem from 2025 to 2030 number 2171

Member of SMEO. Sociedad Mexicana de Oncología. 

University teacher at Universidad Anahuac of Medicine since 2020.

Dr. Ofer Merimsky heads the National Center for bone and soft tissue sarcomas at Sourasky Medical Center. He is a primary specialist in Israel for lung cancer and sarcoma treatment. Dr. Merimsky serves as Deputy Director of the Oncology Institute. He also specializes in complex Whipple surgery for pancreatic cancer cases. He works at JCI-accredited Sourasky Medical Center, ranked among the world's best hospitals by Newsweek.

• Former Chairman of the Oncology Department at Tel Aviv University.
• Past President of the Israeli Society for Medical Oncology and Radiation Therapy.
• Faculty member of the European Society for Medical Oncology (ESMO) for sarcomas.
• Completed specialized training in radiotherapy and brachytherapy at New York Hospital.

1.Bachelor’s degree
- Doctor of medicine, Rangsit university.

2.Master’s degree

>Medical and health science degree
- Professional master’s degree in clinical nutrition in medicine.
- Professional master’s degree in integrative medicine.

>Management degree
- Professional master’s degree in hospital and health services management.

3.Doctorate degree
- Doctorate in psychology (candidate).

4.Diploma
- American Bord of nutritional wellness.
- American naturopathic certification board.

- Certified integrative oncology physician, American institute of integrative oncology.

- Certified fertility wellness physician.

- Certified CBT-I physician.

- Advanced nutritional wellness, IFNW.

-Biochemical and clinical analysis diploma.

- Functional gastroenterology and pediatric food allergies diploma.

- IV nutrition diploma, IFNW.

-Medicinal herbology diploma, IFNW.

Activities • Prevention, research and early diagnosis of cancer • Palliative care in cancer • Cytotoxic chemotherapy • Hormontherapy • Targeted treatment • Immunotherapy Education • 2004 -2010 - Istanbul University, Istanbul faculty of medicine • 2011-2015 - Istanbul University, Istanbul faculty of medicine, internal medicine specialist • 2013-2014 - Cleveland Clinic Endocrinology Department, research associate • 2016-2019 Bezmiâlem Foundation University Medical Oncology Subdivision • Dissertation: Prognostic value of absolute monocyte count in patients with mantle cell lymphoma. • Subdivision Dissertation: An effect of adjuvant chemotherapy on lipid profile and anthropometric parameters in patients with breast and colon cancer. Publications • Circulating Thyroid-Stimulating Hormone Receptor Messenger RNA as a Marker of Tumor Aggressiveness in Patients with Papillary Thyroid Microcarcinoma. Aliyev A, Gupta M, et al. Endocr  18. • The utility of peripheral thyrotropin receptor mRNA in the management of differentiated thyroid cancer. • Aliyev A, Soundararajan S, Bucak E et al. Surgery.  • Diagnostic accuracy of circulating thyrotropin receptor messenger RNA combined with neck ultrasonography in patients with Bethesda III-V thyroid cytology. Aliyev A, Patel J, Brainard J, et al. Surgery.2016 Jan;159(1):113-7. doi: 10.1016/j.surg.2015.06.063. Epub 2015 Oct 9. • Role of Urotensin-2 in 5-Fluorouracil-Related Arterial Vasoconstriction in Cancer Patients. Seker M, Aliyev A, et al. Oncol Res Treat. Epub 2018 Aug 20. • Pertuzumab, trastuzumab and taxane-based treatment for visceral organ metastatic, trastuzumab-naive breast cancer: real-life practice outcomes. Esin E, Oksuzoglu B, Bilici A, Aliyev A. Cancer Chemother Pharmacol.2019 Jan; Epub 2018 Oct 30. • Usefulness of serum M30 and M65 levels to predict response to neoadjuvant chemotherapy in patients with breast cancer. Turk HM, Aliyev A, Celik RS. Curr Probl Cancer.2019 Jul 29. pii: currproblcancer.2019.06.009. • Prognostic impact of primary tumor location on survival in metastatic colorectal cancer patients: A single center experience. Tarik Demir, Murat Araz, Altay Aliyev. Medicine Science International Medicine Journal. • Oral presentations 

Dr. Selime Aydogdu is a specialist in pediatric hematology and oncology. She is known for her work in improving early cancer detection in children. Dr. Aydogdu has given many presentations and led discussions on recognizing early cancer symptoms. Her efforts have raised awareness in her field.

Her work has helped achieve better diagnostic results and higher survival rates for children. Dr. Aydogdu is dedicated to education and advocacy. She is a respected member of the pediatric oncology community.

Dr. Arnon Nagler is an internationally recognized hematologist and bone marrow transplant expert. He is a Professor of Medicine at Tel Aviv University. He is Director Emeritus of Hematology & Bone Marrow Transplantation and the Cord Blood Bank at Sheba Medical Center. He earned his M.D. from the Hebrew University–Hadassah and an M.Sc. in hematopoiesis from Tel Aviv University. He completed postdoctoral training at Stanford. He is board certified in internal medicine and hematology.

He has more than 35 years of experience. He pioneered reduced‑intensity allogeneic transplant protocols for malignant and non‑malignant diseases. He founded Israel’s first public cord blood bank. He performed the country’s first cord blood transplants.

He has held international leadership roles. He served as Chair and Co‑Chair of the ALWP of the EBMT. He was a vice‑chair and long‑term member of EBMT committees. He served on the board of NetCord/EuroCord and as treasurer. He is a frequent invited speaker. He has published widely in journals such as Blood and Leukemia. He has led major clinical trials as a principal investigator and held editorial roles. He has received multiple awards for innovation and clinical excellence.

Prof. Amos Toren, MD, PhD, MHA, is a pediatric hemato-oncologist and BMT specialist. He served as Director of Pediatric Hemato-Oncology and BMT at Sheba Medical Center.

He is board certified in Pediatrics, Pediatric Hemato-Oncology, and Bone Marrow Transplantation. He holds a PhD in Human Genetics. He was Head of the Hematology Division at Tel Aviv University for two terms. He is a member of ASH, COG, ESPHI, EBMT, and CIBMTR. He also serves on the Ministry of Health Cord Blood Committee.

He led one of Israel’s most advanced pediatric oncology and BMT programs. The program treated children and young adults. His focus includes leukemia and lymphoma, immunodeficiencies, and rare cancers. He specializes in BMT and CAR T-cell therapy.

His translational research covers CAR T cells, cytokine-induced killer cells, pediatric brain tumors, and targeted therapies. He has worked with St. Anna, the NIH, and St. Jude. His publications include studies on pediatric SCT prophylaxis and PARP resistance.

Dr. Hana Golan, MD, heads the Pediatric Hemato-Oncology and Bone Marrow Transplantation (BMT) Division at Sheba Medical Center. She specializes in childhood cancers, with a focus on neuroblastoma and other high-risk solid tumors.

She leads one of the region’s most advanced pediatric oncology programs. She manages complex, high-risk cases and practices at a hospital ranked in the global top 10.

She is the principal investigator of the High-Risk Neuroblastoma ESIOP protocol. She serves as an investigator in international Phase I/II trials and as the national coordinator of multicenter oncology protocols. She led the development of computerized chemotherapy protocols and patient databases to improve safety.

She earned her MD from the Technion. She completed residencies in pediatrics and pediatric hemato-oncology at Sheba. She conducted advanced research in transplantation immunology at the Weizmann Institute. She is board-certified in Pediatrics and Pediatric Hematology-Oncology. She is a Senior Lecturer at the Sackler Faculty of Medicine, Tel Aviv University. Her research focuses on cancer stem cells, targeted therapies, treatment-resistant malignancies, and cannabinoid-related oncology.

Experience

• 1990 - 1994 – General Practitioner
• 1994 - 2001 – Research Assistant, Erciyes University, Faculty of Medicine
• 2001 - 2006 – Assistant Professor, Internal Medicine/Hematology, Erciyes University, Faculty of Medicine
• 2006 - 2011 – Associate Professor, Internal Medicine/Hematology, Erciyes University, Faculty of Medicine
• 2011 - 2019 – Professor, Internal Medicine/Hematology, Erciyes University, Faculty of Medicine

Professional Memberships

• Turkish Society of Hematology
• European Group for Blood and Marrow Transplantation (EBMT)
• Hematologic Oncology Association
• Antalya Medical Chamber

Personal Information 

Sex:  Male

Born : 1968 

Professional Experience

Gayrettepe Florence Nigthingale Hospital

Medical Oncology Department

Besiktas/Istanbul/Turkey (ongoing)

Education:

He became Professor (22/April /2016)

Medical Oncology

Attending Phys.in Gastrointestinal Oncology (January 2005 ,2009)

Istanbul University Oncology Institue,

Department of Medical Oncology

Medical Oncology Fellowship (December 2001-December2004)

Istanbul University, Istanbul Medical Faculty

Hemodialysis Traning (May1996-January1997)

Istanbul University ,bCerrahpasa Medical Faculty

Internal Medicine Residency (November 1991-November 1996)

Istanbul University ,bCerrahpasa Medical Faculty

Ege University Medical Faculty (1985-1991)

Professional Experience

February 1999-November 2001

Metropolitan Florence Nigthingale Hospital

American Cancer Center, Gayrettepe/İstanbul

April1997- October 1998

Bayraktar Dialysis Center

Güngören/ Istanbul

Membership

Turkish Medical Oncology Association

ENET(European Neuroendocrine Tumour Society)

ESMO

ASCO

Prof. Dr. Önder SÜRGİT is a General Surgeon in the General Surgery Clinic. Working hours: 09:00–18:00. Core practice areas include laparoscopic surgery, cancer surgery, and bariatric surgery.

Graduated from Hacettepe Faculty of Medicine in 1995. Academic title: Professor. Served as Instructor Surgeon at ITEM (Advanced Medical Technologies Training Center). Held faculty roles at Turgut Özal University and Atılım University, Faculties of Medicine. Also worked at Ankara Medicana Hospital and Optimed Health Group. Foreign language: English.

Dr. Osama Abdel Mohimen Mohamed is Head of the Hematology Unit at Shefaa Al Orman Oncology Hospitals. He is also a consultant in medical oncology and hematology at Shefa El Orman Hospital (NGO), Luxor (2019–present).

He diagnoses and treats acute and chronic leukemia, lymphoma, myeloma, myelodysplastic syndromes, and myeloproliferative neoplasms. He also manages complications of solid tumors.

Background: He served at the National Cancer Institute, Cairo University, as a medical oncology resident, then demonstrator and assistant lecturer (2008–2022). Earlier, he was a house officer (2006–2007). He also held specialist roles at Al Salam International, Al Molalmen, and BAHEYA Oncology Center (NGO).

Memberships: ESMO (2008–present). American Society of Bone Marrow Transplantation (2009). ASH (2010).

Dr. Almog Ben-Yaacov is an Attending Surgeon in the Department of General and Oncological Surgery (Surgery C) at Sheba Medical Center. He specializes in cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC). His clinical focus includes gastric cancer, sarcoma, and complex colorectal malignancies. Since 2018, he has performed more than 200 HIPEC procedures.

MD, Semmelweis University, 2006, with honors. Training in cardiothoracic surgery at Sheba Medical Center. Residency in general surgery at Montefiore (Albert Einstein) and at Rabin (Beilinson). Board-certified in General Surgery and in Surgical Oncology.

Advanced training includes ESSO-certified HIPEC in Hamburg. Microwave liver ablation in Reims. NanoKnife at King’s College London. Advanced surgical oncology at Memorial Sloan Kettering (2019). His publications cover CRS+HIPEC outcomes and Hartmann’s reversal.

Prof. Amit Tirosh is a senior endocrinologist and Head of the Neuroendocrine Tumors Service at Sheba Medical Center. He specializes in neuroendocrine tumors (NETs).

His work centers on hereditary NET syndromes. He is affiliated with the NIH in MEN1 research. He serves on an international VHL expert panel and helped write VHL management guidelines. He is the primary contact at Sheba’s multidisciplinary VHL clinic.

He leads the Endocrine Oncology Bioinformatics Lab. He collaborates with international teams, including the Weizmann Institute. He provides advanced NET care, including PRRT.

He earned his MD from the Hebrew University–Hadassah. He completed a residency at Assaf HaRofeh, an endocrinology fellowship at Rabin, and training at the NIH. He is board-certified in Endocrinology. He is a member of the Israeli Society of Endocrinology, the Endocrine Society, and the European Neuroendocrine Tumor Society. He has authored over 40 peer-reviewed papers, including in JAMA, Gastroenterology, and Radiology.