Adenocarcinoma Doctors Abroad — Page 2

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.

Professor Sezer Sağlam is a leading medical oncologist at Gayrettepe Florence Nightingale Hospital, specialising in the treatment of gastrointestinal adenocarcinoma and neuroendocrine tumours.

• Completed a dedicated fellowship in gastrointestinal oncology at Istanbul University Oncology Institute
• Member of the European Neuroendocrine Tumour Society (ENETS) for specialised cancer care
• Serves as a Professor of Medical Oncology at one of Turkey's top healthcare groups
• Expert in managing complex cases through the American Cancer Center in Istanbul
• Active member of the American Society of Clinical Oncology (ASCO)

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).

Professor Sefik Igdem is a leading radiation oncologist at Gayrettepe Florence Nightingale Hospital. He specialises in using targeted radiotherapy to treat adenocarcinoma, particularly in the prostate, head, and neck.

• Uses Truebeam STx technology to deliver high-dose radiation with millimetre precision
• Specialises in conformal treatments that shape radiation beams to match the tumour
• Utilises Halcyon systems for faster, more comfortable imaging and treatment sessions
• Serves as a Professor at Demiroglu Bilim University – training future specialists
• Expert in managing complex cases involving head and neck cancers

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.

Professor Serkan Keskin is a top-ranked oncologist who achieved first place in Turkey's national medical oncology proficiency exam.

• Performs 1,100+ oncology procedures annually at Memorial Şişli Hospital
• Uses targeted therapy and immunotherapy to treat complex adenocarcinoma cases
• Active member of the American Society of Clinical Oncology (ASCO)
• Published 42 research articles on cancer treatment in international journals
• Award-winning specialist recognised for clinical excellence at the National Cancer Congress

Professor Mustafa Solak completed a specialist fellowship at the University of Texas MD Anderson Cancer Center – consistently ranked as the top cancer hospital globally.

• Specialises in gastrointestinal adenocarcinoma and breast cancer management
• Trained at the Hacettepe University Cancer Institute, a premier research facility
• Expertise includes chemotherapy and targeted systemic therapies for lung and head-neck cancers
• Completed residency training at Istanbul Sisli Etfal Training and Research Hospital
• Focuses on precise drug protocols for complex solid tumours

Dr. Sema Karakas is a gynecologic oncologist at Hisar Hospital Intercontinental in Istanbul. She specializes in scarless V-NOTES surgery for uterine and ovarian cyst removal. Dr. Karakas treats complex conditions like uterine, ovarian, and cervical cancers. She works at a JCI-accredited facility that serves over 250,000 patients annually.

• Performs scarless tubal ligation and hysterectomy using V-NOTES techniques.
• Treats HPV and performs diagnostic colposcopy, LEEP, and conization.
• Manages urinary incontinence using medical, laser, and surgical options.
• Provides surgical treatment for endometriosis and hysteroscopic polyp removal.

Professor Peker is a dual-specialist surgeon who performed over 600 complex operations for pancreatic, stomach, and liver cancers at Hisar Hospital Intercontinental.

• Completed a surgical fellowship at the Mayo Clinic in the United States
• Specialises in hepatopancreatobiliary surgery – treating tumours of the liver, pancreas, and bile ducts
• Holds a PhD in medical biology specifically focused on cancer biology and cellular aging
• Former founder of the hepatopancreatobiliary training unit at Bakirkoy Dr Sadi Konuk Hospital
• Ranked in the top 3 nationally for his gastroenterology surgery specialist examinations

Professor Yesim Yildirim is a leading medical oncologist at Anadolu Medical Center, specialising in immunotherapy and targeted treatments for gastrointestinal and lung adenocarcinomas.

• Followed specialist training in immunooncology at the Mount Vernon Cancer Center in London
• Co-authored the international handbook on precision medicine and advanced cancer care
• Holds a formal attestation from the European Society of Medical Oncology (ESMO)
• Professor at Halic University with over 80 peer-reviewed medical publications
• Specialises in targeted therapies that attack cancer cells while sparing healthy tissue

Dr. Mustafa Ozdogan is a professor and medical oncology specialist at Memorial Göztepe Hospital. He is the current President of the Antalya Breast Cancer Association. Dr. Ozdogan previously led oncology departments at Memorial Antalya and Medstar Antalya hospitals. He focuses on a multidisciplinary approach to complex cancer care.

• Sits on the board of the Turkish Society of Medical Oncology.
• Maintains active membership in ESMO and ASCO.
• Co-chairs the national working group for head and neck cancers.
• Works at Memorial Göztepe, which features MR Linac and robotic surgery systems.