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Prof. Dr. Özge Gümüşay Medical Oncology

Prof. Dr. Özge Gümüşay

✓ Medically verified profile
Medical Oncology

Prof. Dr. Özge Gümüşay

✓ Medically verified profile
20+ years experienceLanguages: Turkish, EnglishOnline consultationAcibadem Atasehir Hospital · İstanbul
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Prof. Dr. Özge Gümüşay
Profile

About Prof. Dr. Özge Gümüşay

Quick answer

Prof. Dr. Özge Gümüşay is a Medical Oncology specialist at Acibadem Atasehir Hospital in İstanbul with over 20 years of experience.

She treats breast cancer, including metastatic and triple-negative disease, as well as gastric cancer, and handles chemotherapy, targeted cancer therapy, cancer immunotherapy, CDK4/6 inhibitor therapy, pembrolizumab therapy, immunotherapy toxicity management, and liquid biopsy in breast cancer. She offers consultations in Turkish and English, including online video consultation.

Prof. Özge Gümüşay is a clinical oncology professor affiliated with Acibadem University Faculty of Medicine. Appointed to the professorship in 2023, she brings advanced medical training and leadership to her clinical and academic roles. Since 2022 she has been associated with Acibadem Health Group, contributing to patient care, multidisciplinary collaboration, and medical education.

She is an active member of leading oncology organizations, including the American Society of Clinical Oncology (ASCO), the European Society for Medical Oncology (ESMO), and the Turkish Society of Medical Oncology (TTOD). Her membership in these societies reflects a commitment to evidence-based practice, staying current with global advances in cancer treatment, and participating in the international oncology community. Known for combining clinical expertise with teaching and research, Prof. Gümüşay focuses on delivering high-quality patient care while mentoring the next generation of physicians and engaging in professional development within national and international oncology networks.

Clinical Focus

Areas of Expertise

Conditions treated and procedures performed by this specialist.

Breast cancerMetastatic breast cancerTriple-negative breast cancerEarly triple-negative breast cancerMetastatic triple-negative breast cancerGastric cancerCDK4/6 inhibitor therapy for breast cancerPembrolizumab therapy for triple-negative breast cancerCancer immunotherapyImmunotherapy toxicity managementTargeted cancer therapyChemotherapy for cancerLiquid biopsy in breast cancer
Background

Education

  • 2023Acibadem University Faculty of Medicine / Professor
  • 2022Acibadem University Faculty of Medicine/ Associate Professor
  • 2017Gaziosmanpaşa University Faculty of Medicine/ Associate Professor
  • 2014Gazi University Faculty of Medicine Medical Oncology
  • 2010Gazi University Faculty of Medicine Internal Medicine
  • 2005Hacettepe University Faculty of Medicine
Career

Professional Experience

  • 2022Acibadem Health Group
  • 2021Stanford University Comprehensive Cancer Center, Palo Alto, California, (Visiting Observer)
  • 2019–2021UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, California, (Breast Cancer Oncology)
  • 2017–2019Gaziosmanpaşa University Faculty of Medicine, Medical Oncology Specialist, Associate Professor
  • 2014–2017Gaziosmanpaşa University Faculty of Medicine, Medical Oncology Specialist, Assistant Professor
  • 2010–2014Gazi University Faculty of Medicine, Medical Oncology Subspecialty Research Assistant
  • 2006–2010Gazi University Faculty of Medicine, Internal Medicine Research Assistant
Affiliations

Professional Memberships

  • American Society of Clinical Oncology (ASCO)
  • The European Society of Medical Oncology (ESMO)
  • Turkish Society of Medical Oncology (TTOD)
Research

Selected Publications

  • CDK4/6 inhibitors: Mechanisms of resistance and potential biomarkers of responsiveness in breast cancer Future Oncology, 2022 Mar;18(9):1143-1157. Cetin B, Wabl CA, Gumusay O.
  • Immunotherapy Toxicity: identification and management Breast Cancer Res Treat 2022 Feb;192(1):1-17. Gumusay O, Callan J, Rugo HS.
  • Immunotherapy in Breast Cancer and the Potential Role of Liquid Biopsy. Front. Oncol., March 15, 2022. (share first authorship) Magbanua MJ, Gumusay O, Kurzrock R, vant Veer LJ, Rugo HS.
  • The role of percutaneous vertebral augmentation in patients with metastatic breast cancer: Literature review including report of two cases Breast. 2022 Apr 2;63:149-156. Gumusay O, Huppert LA, Behr SC, Rugo HS.
  • Emerging treatment strategies for metastatic triple-negative breast cancer. Therapeutic Advances in Medical Oncology. January 2022. Huppert LA, Gumusay O, Rugo HS.
  • Trials of Immunotherapy in Triple Negative Breast Cancer. Curr Breast Cancer Rep 13, 171185 (2021). Gumusay O, Wabl, CA, Rugo HS.
  • Pembrolizumab for Early Triple-Negative Breast Cancer. N Engl J Med 2020 Jun 25;382(26): e108. Cetin B, Gumusay O.
  • Strategic Combinations to Prevent and Overcome Resistance to Targeted Therapies in Oncology. Am Soc Clin Oncol Educ Book. 2020 May;40:e292-e308. Gumusay O, Vitiello PP, Wabl C, Corcoran RB, Bardelli A, Rugo HS.
  • Factors Influencing Chemotherapy Goal Perception in Newly Diagnosed Cancer Patients J Cancer Educ. 2016 Jun;31(2):308-13. Gumusay O, Cetin B, Benekli M, Gurcan G, Ilhan MN, Bostankolu B, Ozet A, Uner A, Coskun U, Buyukberber S.
  • Discordances in HER2 status between primary gastric cancer and corresponding metastatic sites Japanese Journal of Clinical Oncology. 2015 May; 45(5), 416-421. Gumusay O, Benekli M, Ekinci O, Baykara M, Ozet A, Coskun U, Demirci U, Uner A, Dursun A, Atak EY, Buyukberber S.
Good to Know

Frequently Asked Questions

What is Dr. Özge Gümüşay's specialty?
Dr. Özge Gümüşay is a specialist in Medical Oncology at Acibadem. For a personalised assessment, the Acibadem international patient team can review your medical history and reports and explain the suitable next steps.
Which hospital does Dr. Özge Gümüşay practise at?
Dr. Özge Gümüşay sees patients at Acibadem Atasehir Hospital in İstanbul. The international patient team can confirm current availability and help you plan a consultation or visit.
What languages can I use when consulting Dr. Özge Gümüşay?
Consultations with Dr. Özge Gümüşay are supported in Turkish and English. In addition, Acibadem provides multilingual coordination and interpreter support so international patients can communicate clearly throughout their care.
How can I book an appointment with Dr. Özge Gümüşay?
You can request an appointment with Dr. Özge Gümüşay using the appointment form on this page, or by contacting the Acibadem international patient team by phone or WhatsApp. After you share your details, the team checks availability and confirms your appointment, usually within 24 hours.
Is an online video consultation available with Dr. Özge Gümüşay?
Yes. Dr. Özge Gümüşay offers online video consultations, so you can discuss your condition and reports with the specialist before making any travel arrangements. The international patient team can help you schedule a secure video visit.
How many years of experience does Dr. Özge Gümüşay have?
Dr. Özge Gümüşay has around 20 years of professional experience in Medical Oncology. A summary of education, experience and professional memberships is available on this page.
Can international patients arrange treatment with Dr. Özge Gümüşay?
Yes. Acibadem supports international patients end to end — from the first consultation and treatment planning through appointment scheduling, interpretation during the stay and follow-up after returning home. Sharing your case for an initial assessment is free of charge.
How do I get a second opinion involving Dr. Özge Gümüşay?
You can request an independent review of your diagnosis and proposed treatment. Share your medical reports through the consultation or "Ask a Doctor" form on this site, and the team will arrange a specialist review and explain the available options.
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Where

Hospitals

Acibadem Hospitals Group modern hospital buildings illuminated at night, showcasing advanced healthc.
Acibadem Atasehir Hospitalİstanbul · Hospital
Departments

Medical Units

Medical Unit
Medical Oncology Department
Treatments

Treatments Performed

Treatment
Breast Cancer
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