Dr. Marinos Tsiatas: Medical Oncologist in Athens
Patients searching for a medical oncologist in Athens with specialist training in cancer immunotherapy and genitourinary malignancies will find a well-credentialled option in Dr. Marinos Tsiatas. A practising oncologist at Athens Medical Center and a researcher of two decades’ standing, Dr. Tsiatas combines rigorous academic training in immunology with hands-on clinical experience leading Phase II–III trials. His profile on Asklepieia Health allows patients and their families to review his credentials, services, and availability before requesting an in-person appointment.
Academic Credentials and Professional Certifications
Dr. Tsiatas holds three degrees from the University of Athens: a Bachelor of Science in Biology (1994), a Doctor of Medicine (2000), and a PhD in Immunology (2001). His doctoral research examined the immunological properties of cytokines in antigen presentation and cytotoxicity models — a background that directly informs his current clinical focus on immune-mediated cancer treatments.
He is board-certified by both the European Society for Medical Oncology (ESMO), one of the leading European professional bodies for oncology practice and clinical guideline development, and the Hellenic Society of Oncologists-Pathologists. In 2010–2011, he held a visiting research scholarship at the Ovarian Cancer Research Center within the Abramson Cancer Center, University of Pennsylvania — an internationally recognised translational oncology research environment. The scholarship was funded by the Hellenic Society of Medical Oncology.
Between 2013 and 2019, Dr. Tsiatas served as Medical Advisor in Oncology and Haematology for Janssen Pharmaceutical Companies of Johnson & Johnson in Greece. This role provided sustained insight into the clinical development pipeline for cancer treatments at a time when checkpoint inhibitor combinations were entering late-phase trials across multiple solid tumour indications.
Areas of Clinical Specialisation
Dr. Tsiatas’s clinical practice at Athens Medical Center centres on two main domains: genitourinary and gynaecologic-breast malignancies, and immuno-oncology.
Within genitourinary oncology, he treats patients with urothelial carcinoma and muscle-invasive bladder cancer, renal cell carcinoma at both early and advanced stages, and metastatic castration-resistant prostate cancer. His gynaecological and breast oncology work includes HR-positive and HER2-low metastatic breast cancer, as well as other gynaecologic malignancies within his practice.
In the immuno-oncology domain, Dr. Tsiatas works with checkpoint inhibitor-based treatment regimens — including therapies targeting the PD-1/PD-L1 and CTLA-4 immune regulatory pathways. These treatments are designed to restore the immune system’s ability to recognise and respond to cancer cells. His doctoral grounding in cytokine biology and antigen presentation directly informs his approach to selecting and monitoring these agents in individual patients.
- Urothelial carcinoma and muscle-invasive bladder cancer
- Renal cell carcinoma (early and advanced stages)
- Metastatic castration-resistant prostate cancer
- HR-positive and HER2-low metastatic breast cancer
- Checkpoint inhibitor and combination immunotherapy regimens (PD-1/PD-L1, CTLA-4)
- Other solid tumours and haematologic malignancies
Principal Investigator in Phase II–III Clinical Trials
One of the more distinctive aspects of Dr. Tsiatas’s practice is his sustained role as a Principal Investigator (PI) in industry-sponsored Phase II–III clinical trials. GCP-certified since 2023, he has led and continues to lead a substantial portfolio of trials across renal cell carcinoma, urothelial carcinoma, prostate cancer, and breast cancer.
Active and completed trial programmes in which he has served as PI include CA209-8Y8, CONTACT-03, SUNRISE-1, SUNRISE-2, VOLGA, PROOF-302, JAVELIN Bladder 10, JAVELIN Bladder Medley, MORPHEUS-UC, KEYNOTE-B15, IMbassador250, CONTACT-02, PRONOUNCE, and DS8201-A-U303, among others. This active research portfolio means that eligible patients under his care at Athens Medical Center may have access to investigational treatments within structured clinical protocols. Patients interested in trial eligibility should raise this during a direct consultation.
Booking an Appointment with Dr. Tsiatas Through Asklepieia
Asklepieia Health lists Dr. Tsiatas as a verified partner on its medical marketplace, giving patients direct access to his profile, services, and appointment availability. His practice accepts in-person consultations at Athens Medical Center, Kifisias Avenue 56, Marousi. Patients uncertain whether a specialist consultation is appropriate for their situation can use Asklepieia’s Ask for Treatment service to describe their medical circumstances and receive guidance before committing to a visit.
Dr. Tsiatas consults in both English and Greek. This is relevant for international patients or Greek diaspora seeking ESMO-certified oncology guidance from a physician with international research experience who practices in Athens.
To review Dr. Tsiatas’s full credentials, available services, and appointment options, visit his profile on Asklepieia and request an in-person consultation at Athens Medical Center.
Frequently Asked Questions
What types of cancer does Dr. Tsiatas specialise in treating?
Dr. Tsiatas specialises in genitourinary cancers — including bladder cancer (urothelial carcinoma), kidney cancer (renal cell carcinoma), and prostate cancer — as well as metastatic breast cancer and gynaecologic malignancies. He also treats other solid tumours and haematologic malignancies within his oncology practice at Athens Medical Center.
Is Dr. Tsiatas certified by a European oncology body?
Yes. Dr. Tsiatas holds certification from both the European Society for Medical Oncology (ESMO) and the Hellenic Society of Oncologists-Pathologists, confirming that his training and practice meet European standards for medical oncology.
Does Dr. Tsiatas participate in clinical trials?
Yes. Dr. Tsiatas serves as Principal Investigator in multiple Phase II–III clinical trials at Athens Medical Center, covering renal cell carcinoma, urothelial carcinoma, prostate cancer, and breast cancer. Patients interested in trial eligibility should discuss this directly with him during a consultation.
Can international patients consult Dr. Tsiatas?
Dr. Tsiatas consults in both English and Greek. International patients can use the Asklepieia Health platform to review his profile and request an in-person appointment, or use the Ask for Treatment service to describe their case before travelling to Athens.
Where does Dr. Tsiatas practise?
His primary clinical practice is at Athens Medical Center (Athens Medical Group), Kifisias Avenue 56, Marousi, Athens. Clinical trial activities are conducted within Athens Medical Center and collaborating institutions, depending on the specific protocol and sponsor requirements.
Conclusion
Dr. Marinos Tsiatas offers patients seeking a medical oncologist in Athens a specialist with a triple academic background in biology, medicine, and immunology, ESMO certification, a visiting fellowship at the University of Pennsylvania’s Abramson Cancer Center, and an active PI portfolio spanning more than a dozen Phase II–III clinical trials. His practice at Athens Medical Center covers genitourinary cancers, gynaecologic and breast malignancies, and checkpoint inhibitor-based immunotherapy regimens. Patients can review his full profile and request an appointment through Asklepieia Health, where his listing, services, and availability are published directly.
This article is for informational purposes only and does not constitute medical advice. Treatment options, clinical outcomes, costs, eligibility, and legal or regulatory requirements may vary by individual circumstance and by jurisdiction. Always consult a qualified physician — and, where relevant, a qualified legal advisor — before making decisions about diagnosis, treatment, or care arrangements.
