MARIANNA POLYDORIDES
PEDIATRIC SURGEON, BSc, MD
Consultant Pediatric Surgeon, 3rd Pediatric Surgery Department, “HYGEIA – MITERA children” Hospital
Medical Specialty: PEDIATRIC SURGEON, BSc, MD
Current position
Consultant Pediatric Surgeon, 3rd Pediatric Surgery Department, “HYGEIA – MITERA children” Hospital (December 2025)
Education and Academics
- Medical Doctor (MD), Medical University of Sofia, Bulgaria (2010 – 2016)
- Bachelor of Science (BSc) in Biological Sciences, University of Brighton, United Kingdom (2007-2010)
Professional Experience
- Consultant Pediatric Surgeon, 3rd Pediatric Surgery Department, Hygeia-Mitera Pediatric Hospital, Athens, Greece (December 2025 – Present)
- Pediatric Surgery resident, Pediatric Surgery department, Hippocratio General Hospital, Thessaloniki, Greece (June 2019 – September 2025)
- Clinical Observer, Pediatric Urology Department, Great Ormond Street Children’s Hospital, London, United Kingdom (April 2024 – July 2024)
- General Surgery resident, General surgery department and department of breast oncoplastics, Theagenio Oncologic Hospital, Thessaloniki, Greece (June 2017 – March 2019)
Clinical Interest
Special interest in congenital colorectal and urogenital conditions and minimally invasive pediatric surgery.
Courses, meetings and conferences
- 15th Annual ESPES Congress, Athens, Greece. Active participant. Laparoscopic skills pre-congress workshop (October 2025)
- 25th Annual EUPSA Conference, Bologna, Italy. Active participant, poster presentation. Laparoscopic skills pre-congress workshop (June 2024)
- International Paediatric Live Surgery Online Group (IPLSOG) meetings. Active participant and presenter (2023 – 2024)
- 34th Panhellenic Congress of Paediatric surgery, Thessaloniki, Greece. Member of the local organizing committee, oral presentation (October 2023)
- Paediatric minimally invasive surgery and urology course, Geneva, Switzerland. Active participant (August 2023)
- APLS course, Thessaloniki, Greece. Active participant (March 2023)
- Peña Colorectal Course. Online participation (2022)
- 22ND Annual EUPSA Conference, Athens, Greece. Active participant, poster and oral presentations. Colorectal surgery pre-congress workshop. (September 2021)
Volunteering
A volunteer with Médecins du Monde since 2023, providing medical services through their free clinic and mobile clinic, working with patients unable to receive care due to language barriers, addiction or other socioeconomic struggles.
Board Member
Greek Association of Pediatric Surgeons
Recent Presentations and Publications
- Dextranomer/Hyaluronic Acid Versus Polyacrylate Polyalcohol Copolymer For Endoscopic Treatment Of Vesicoureteric Reflux: A Retrospective Single-Center Comparative Study
Ai. Tzantzaroudi, M. Petridou, M. Polydorides, Ch. Voskidis, G. Papouis.
15th Annual ESPES Congress 2025, Athens, Greece (poster)
- Managing solitary functioning kidney (SFK) with multiple congenital anomalies of the kidney and the urinary tract (MCAKUT): a small Odyssey.
A.Tzantzaroudi, C. Mariorakis, A. Okeke, I. Mangou, C. Voskidis, M. Polydorides, G. Papouis.
26th Annual EUPSA Congress, Dubrovnik, Croatia, May 2025 (poster)
- Infantile fibrosarcoma overlying a congenital melanocytic nevus – A challenging tumour in an infant: Case report and Review of the literature.
Dionyssiou D., Polydorides M.,Voskidis C., Okeke K., Petridou M., Dimitri I., Pegios A., Papouis G., Demiri E., Galanis I.
25th Annual EUPSA Congress, Bologna, Italy, June 2024 (poster)
- “Not an ordinary day in the office”: when a referral for a possible hernia turns into a rare case of inguinal rhabdomyosarcoma.
Polydorides M., Ioannou G., Pegios A., Georgakis I., Papouis G., Tsikopoulos G.
34th Panhellenic Congress of Paediatric Surgery, Thessaloniki, Greece, October 2023 (oral presentation)
- Nephron-sparring surgery for unilateral syndromic Wilm’s tumor: Our experience.
Boutouridou E., Polydorides M., Georgiou E., Stefanidis C., Tzantzaroudi A., Tsikopoulos G.
34th Panhellenic Congress of Paediatric Surgery, Thessaloniki, Greece, October 2023 (oral presentation)
- Exophytic pancreatoblastoma: An unknown tumor in infants.
M. Papoutsakis, El. Georgiou, M. Polydorides, K. Okeke, M. Petridou, V. Mariorakis, I. Georgakis, A. Dimatou, I. Damianidou, E. Papakonstantinou.
24th Annual EUPSA Congress, Izmir, Turkey, June 2023 (oral presentation)
- A case of acute abdomen as a rare complication of Noonan syndrome.
M. Petridou, C. Voskidis, G. Ioannou, M. Polydorides, I. Georgakis, G. Papouis
23rd Annual EUPSA Congress, Tel Aviv, Israel, June 2022 (poster)
- Oesophageal replacement with gastric transposition (GT) – Complications
G. Tsikopoulos, El. Georgiou, Ai. Tzatzaroudi, M. Polydorides, I. Dimitri, Th. Dionysis, M. Sklavos
23rd Annual EUPSA Congress, Tel Aviv, Israel, June 2022 (poster)
- Hickman catheter replacement via the existing tunnel at the same venous site. An alternative central veins – sparring method
M. Polydorides, Ai. Tzantzaroudi, I. Georgakis, Ch. Stefanidis, M. Papoutsakis, G. Tsikopoulos
22nd Annual EUPSA Congress, Athens, Greece, September 2021 (poster)
Articles:
- Giant cystic lymphangioma as a rare cause of acute abdomen in infancy: a case report and literature review
Mariorakis C, Boutouridou E, Pegios A, Magaliou V, Polydoridou M, Georgakis I, Chochliourou E, Chatziioannidis I, Anestiadou E, Papouis G.. Folia Med (Plovdiv) 2024;66(5):737-742. doi: 10.3897/folmed.66.e124560
- Pediatric Leukemia From an Orthopedic Perspective: A Case of Acute Lymphoblastic Leukemia Initially Managed as Septic Hip With Osteomyelitis.
Antigoni Gkoudina, Christos Gekas, Marianna Polydorides, Georgios Graikos, Evgenia Papakonstantinou, Panagiotis Saloupis
Cureus 14(4): e24103. DOI 10.7759/cureus.24103
- Hepatic Lesions in Children Related to Congenital Portal Venous Shunts.
Marianna Polydorides, Eleftheria Georgiou, Ekaterini Tzantzaroudi, Christos Chaidos, Ioannis Xinias, George Tsikopoulos
Aristotle Biomedical Journal, Vol 2, No 1, pp. 84-92, e-ISSN: 2653-9748
- Endoscopic transgastric drainage of pancreatic pseudocyst in hereditary pancreatitis. A case report.
Eleftheria Georgiou, Aikaterini Tzantzaroudi, Marianna Polydorides, Ioannis Xinias, Christos Chaidos, George Tsikopoulos
Aristotle Biomedical Journal, Vol 2, No 1, pp. 75-83, e-ISSN: 2653-9748