PET/CT Doctors Abroad — Page 2

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).

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.

Dr. Sefik Igdem is a radiation oncologist at Gayrettepe Florence Nightingale Hospital in Istanbul. He specializes in treating head, neck, and prostate cancers. He currently serves as a Professor at Demiroğlu Bilim University. Dr. Igdem uses Truebeam STx and Halcyon systems for accurate radiotherapy.

• Specializes in conformal treatments for complex tumor cases.
• Treats various conditions including lung, breast, and brain tumors.
• Practices at a JCI-accredited hospital that serves 200,000 patients annually.
• Completed his radiation oncology training at the Istanbul University Cerrahpaşa Faculty.

Dr. Sinan Karaaslan is a medical oncologist at Anadolu Medical Center in Istanbul. He specializes in treating breast, colorectal, and urogenital system cancers. Dr. Karaaslan brings clinical expertise from major institutions, including Medical Park and Gülhane Military Medical Academy. He works at a hospital affiliated with the Johns Hopkins Hospital.

• Holds personal certification from the European Society for Medical Oncology.
• Treats complex conditions, including stage 4 colon and lung cancers.
• Member of the Turkish Medical Oncology and Turkish Lung Cancer societies.
• Performs systemic therapies such as immunotherapy, targeted therapy, and chemotherapy.

Dr. Mustafa Solak is a clinical oncologist at Hisar Hospital Intercontinental in Istanbul. He completed a fellowship at the prestigious Hacettepe University Cancer Institute. Dr. Solak previously practiced at The University of Texas MD Anderson Cancer Center. He treats a variety of complex cancers, including lung, breast, and gastrointestinal malignancies.

• Specializes in the treatment of testicular, ovarian, and head and neck cancers.
• Performs oncology procedures including chemotherapy, immunotherapy, and targeted therapy.
• Trained at Hacettepe University and Istanbul Sisli Etfal Training Hospital.
• Practices at a JCI-accredited facility that treats over 500,000 patients annually.

Dr. Yesim Yildirim is a medical oncologist at Anadolu Medical Center. She specializes in immunotherapy and targeted therapy for breast, lung, and gastrointestinal cancers. Dr. Yildirim is ESMO-certified and holds the rank of Professor. She completed training at Mount Vernon in the UK and Rambam Medical Center.

• Authored over 80 scientific publications on tumor biology and precision medicine.
• Treats complex cases including melanoma, sarcomas, and stage 4 lung cancer.
• Member of ASCO and the International Society of Gastrointestinal Oncology.
• Works at Anadolu Medical Center, an affiliate of Johns Hopkins Hospital.

Dr. Gorkem Turkkan is a radiation oncologist at Hisar Hospital Intercontinental in Istanbul. He has successfully completed over 2,500 radiotherapy sessions using MR-Linac technology. Dr. Turkkan focuses on MRI-guided radiotherapy and stereotactic treatments for various cancers. He conducted clinical research on proton therapy at the MAASTRO Clinic in the Netherlands.

• Specializes in prostate, breast, lung, and head and neck cancer treatments.
• Uses VMAT and IMRT techniques to target tumors with precision.
• Maintains membership in the European Society of Radiotherapy and Oncology.
• Works at a JCI-accredited hospital serving 500,000+ patients annually.

Dr. Kivanc Derya Peker is a gastrointestinal surgeon at Hisar Hospital Intercontinental in Istanbul. He co-founded the Hepatopancreatobiliary Surgery unit at Bakırköy Dr. Sadi Konuk Hospital. Dr. Peker completed specialized training at the Mayo Clinic in the United States. He treats complex cancers of the liver, pancreas, and stomach.

• Performed over 400 pancreatic and gastric cancer surgeries to date.
• Completed over 200 liver surgeries and numerous kidney transplants.
• Ranked in the top 3 during his national gastroenterology surgery minor examination.
• Practices at JCI-accredited Hisar Hospital, which serves 500,000 patients annually.