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I. Publications in International Journals

A. Experimental Studies

Doner F, Delibas N, Dogru H, Sari I, Yorgancigil B. Malondialdehyde Levels and Superoxide Dismutase Activity in Experimental Maxillary Sinusitis. Auris Nasus Larynx. 1999; 26(3): 287-91.

Döner F, Delibaş N, Dogru H, Yarıktaş M, Demirci M. The Role of Free Oxygen Radicals in Experimental Otitis Media. J Basis Clin Physiol Pharmacol. 2002; 13: 33-40.

Tuz M, Eroglu E, Dogru H, Delibas N, Tunc B, Uygur K. The Effect of Replacement Fluids and Normovolemic Hemodilution on the Survival of Dorsal Skin Flaps in Rats. Clin Otolaryngol. 2004; 29(1): 80-83.

Yarıktas M, Doner F, Ozguner F, Gokalp O, Dogru H, Delibas N. Nitric Oxide Level in the Nasal and Sinus Mucosa After Exposure to Electromagnetic Field. Otolaryngology-Head and Neck Surgery. 2004.

Education and Expertise

• HACETTEPE UNIVERSITY FACULTY OF MEDICINE

Diseases

• Endometriosis – Advanced stage
• Endometrium
• Advanced Ovarian Cancer
• Myoma uteri diseases
• Ovarian cysts
• Benign diseases of the uterus

Treatment Methods

• Hypothermic intraperitoneal chemotherapy
• Laparoscopy
• Minimally invasive operations
• Cytoreductive surgery
• Vulva aesthetics

Experience

• 2001 – Ankara Etlik Training and Research Hospital, Department of Obstetrics and Gynaecology
• 2011 – Medical Specialization Board Gynecological Oncology Surgery

Professional Memberships

• European Society of Gynaecological Oncology
• Minimally Invasive Gynecologic Oncology Association
• Cervical Pathology and Colposcopy Association
• Turkish Obstetrics and Gynecology Association
• Turkish Gynecological Oncology Association
• Society of Robotic Gynecological Surgery
• Turkish Medical Association
• Pelvic Pain and Endometriosis Association

Education and Specialization

• 2006: Kocaeli University Faculty of Medicine
• 2014: Akdeniz University Faculty of Medicine, Internal Medicine
• 2018: Akdeniz University Faculty of Medicine, Medical Oncology

Experience

• 2006 - 2008: Konya Derebucak District Hospital
• 2009 - 2015: Akdeniz University Hospital
• 2015: Antalya Kaş State Hospital
• 2015 - 2016: İnönü University Faculty of Medicine
• 2016 - 2021: Akdeniz University Hospital
• 2021 - 2023: Antalya Training and Research Hospital

Education

• (2004 – 2011), Faculty of Medicine/ Inonu University/ Malatya, Turkiye
• (2011 – 2015), Department of Radiology/ Bagcilar Training and Research Hospital/ Istanbul, Turkiye

Career

• (2016 – 2020), Diagnostic and Interventional Radiologist/ Mus State Hospital/ Mus,Turkiye
• (2020 – 2022), Assistant Professor of Diagnostic and Interventional Radiology/ Sakarya University Training and Research Hospital/ Sakarya, Turkiye
• (2023 – 2024), Associate Professor of Diagnostic and Interventional Radiology /Sakarya University Training and Research Hospital/ Sakarya, Turkiye
• (2024 - Present), Associate Professor of Diagnostic and Interventional Radiology /Medipol University Hospital/ Istanbul, Turkiye

Dr. Hamdullah Sozen is a gynecologic oncologist with expertise in ovarian, endometrial, and cervical cancers. He is known for his skills in gynecological endoscopic surgery. Dr. Sozen uses minimally invasive techniques that help patients recover faster and improve outcomes.

He is an expert in colposcopy and cervical pathology. He has advanced training in both diagnostic and interventional procedures. Dr. Sozen completed his medical and oncology training at leading Turkish institutions, including Akdeniz University, Zeynep Kamil, and Istanbul Medical Faculty.

He is an active member of international associations such as ESGO and MEMAGO. Dr. Sozen has contributed to women’s cancer care through his clinical work, research, and teaching.

Dr. Gamze Baykan Ozguc is a gynecologist and obstetrician with expertise in advanced women’s health. She is skilled in colposcopic, laparoscopic, hysteroscopic, and urogynecological surgeries. Dr. Ozguc offers minimally invasive procedures that support faster recovery and better outcomes for her patients.

She is certified in both Active Birth and Emergency Obstetric Care. Dr. Ozguc combines natural birthing methods with modern emergency care to provide safe and personalized delivery experiences. She is also trained in aesthetic and functional gynecology, helping women improve their confidence and quality of life.

Dr. Ozguc has worked at respected institutions, including Liv Hospital Ulus and Taksim Training and Research Hospital. She is a member of TJOD, TSRM, and the Turkish Perinatology and Urogynecology Associations. Her certifications include fetal medicine ultrasound, fractional CO₂ laser, and advanced surgical techniques. Dr. Ozguc is committed to ongoing professional development.

Education and Specialization

• 1982 - 1987: Ege University Faculty of Medicine
• 1987 - 1993: İzmir Atatürk Training and Research Hospital – Specialization

Experience

• 1993 - 1996: İzmir Atatürk State Hospital – Specialist Doctor
• 1996 - 1998: İnönü University Faculty of Medicine – Assistant Professor
• 1998 - 2001: İnönü University Faculty of Medicine – Associate Professor
• 2001 - 2005: Başkent University Adana Practice and Research Hospital – Associate Professor
• 2006 - 2007: Başkent University Adana Practice and Research Hospital – Professor
• 2007 - 2013: Başkent University Istanbul Practice and Research Hospital – Professor
• 2013 - 2015: Hisar Intercontinental Hospital, Istanbul – Professor
• 2015 - Present: Acıbadem Bakırköy Hospital, Istanbul – Professor

Education and Specialization

• 2004/2010: Fırat University Faculty of Medicine
• 2012/2017: Uludağ University Faculty of Medicine – Specialization

Experience

• 2017/2021: Ankara Training and Research Hospital
• 2021/2023: Kilis State Hospital
• 2023/2024: Private Gaziantep Emek Hospital

Professional Memberships

• Aesthetic and Cosmetic Dermatology Society (Estetik ve Kozmetik Dermatoloji Derneği)
• Turkish Dermatology Society (Türk Dermatoloji Derneği)
• Turkish Medical Association (Türk Tabipler Birliği)

Education and Expertise

• AKDENİZ UNIVERSITY FACULTY OF MEDICINE
• TRAKYA UNIVERSITY FACULTY OF MEDICINE

Diseases

• Lung Cancers
• Head Tumors
• Neck Tumors
• Other Cancers
• Gastrointestinal tract tumors
• Genitourinary system tumors
• Breast Cancers
• Urooncological Tumors

Treatment Methods

• IGRT
• IMRT
• Radiosurgery- SRS – SABR- SBRT

Experience

• Izmir University of Economics Faculty of Medicine, Medical Point Izmir Hospital Radiation Oncology Clinic; Radiation Oncology Specialist
• Denizli State Hospital Radiation Oncology Clinic; Radiation Oncology Specialist
• Gülhane Military Medical Academy Radiation Oncology Department; Military Specialist Physician
• Akdeniz University Faculty of Medicine Department of Radiation Oncology; Radiation Oncology Specialist Training
• Trakya University Faculty of Medicine; Medical Education

Professional Memberships

• Turkish Radiation Oncology Association
• Urooncology Association (Consultant member)
• Clinical Research Association
• Turkish Bioethics Association (Honorary member)

Education

• Graduation: Faculty of Medicine, Istanbul University, 1994
• Specialization: Internal Medicine, SBU Haseki Hospital, 1998
• Specialization: Gastroenterology, SBU Sisli Etfal Hospital, 2007
•  

Experience

• Associate Professorship SBÜ Ümraniye EAH, 2012
• Professorship SBÜ Ümraniye EAH, 2017
• Professorship Biruni University, 2023
•  

Scientific Memberships

• Turkish Gastroenterology Association
• Turkish Liver Association
• Inflammatory Bowel Diseases Association
• HEBIPA (Hepatitis Infections Union and Prophylaxis Association)
•  

Awards

• "National Scholar Award" in 2011 UEGW Stockholm for his study titled "Levofloxacin Based Sequential and Triple Therapy Compared with Standard Plus Probiotic Combination for Helicobacter Pylori Eradication".
• "Microscopic Colitis and Focal Active Colitis Coexistence in Patients with Irritable Bowel Syndrome" 3rd prize in the Poster Paper category at the 23rd National Gastroenterology Week 2006.
• "Investigation of Damage Pathways in Liver Tissue in Chronic Hepatitis B: A Comparative Proteomic Study" in the 26th issue of Turkish J. Gastroenterol in 2015.
• "Investigations of the EGF and its receptor EGFR gene variants in ulcerative colitis", 3rd prize in the Oral Presentation category at the XVth Eurasian Congress of Gastroenterology and Surgery 2016.
• 1st prize in the Oral Presentation category at the XVIth National Hepatitis Congress in 2023 with the study titled "Prospective evaluation of four-year follow-up results of Hepatitis C patients in AMATEM follow-up".

Medical Intrests

• EUS
• ERCP
• Cholangioscopy
• POEM
• Stomach Balloon
• ESD
• Colonoscopy
• Polypectomy
• Inflammatory bowel diseases
• Liver Cirrhosis
• Gastroesophagial Reflux Disease,
• Functional Diseases
• IBS
• Dyspepsia
• Motility
• Manometry
•  

Education and Expertise

• DOKUZ EYLÜL UNIVERSITY FACULTY OF MEDICINE

Diseases

• Hernia Surgery
• Breast Diseases
• Stomach Cancer
• Gallbladder Diseases
• Thyroid Diseases
• Esophageal Cancer

Treatment Methods

• Gastric Bypass
• Laparoscopic Hernia Surgery
• Laparoscopic Gallbladder Surgery
• Breast Surgery
• Gastric Balloon
• Mini Gastric Bypass
• Reflux Surgery
• Revision Surgery
• SADI-S Surgery
• Thyroid Surgery
• Gastric Sleeve
• Swallowable Gastric Balloon

Experience

• Bulent Ecevit University General Surgery
• Van Education and Research Hospital
• Izmir Private Egeşehir Hospital
• Izmir Private Egepol Hospital
• Izmir Private Central Hospital
• Izmir University of Economics Medical Point Hospital

Professional Memberships

• National Turkish Surgical Association
• National Society of Hepato Pancreatico Biliary Surgery
• National Society of Colon Rectal Surgery
• National Society for Minimally Invasive Surgery
• National Society of Robotic Surgery
• National Society of Endocrine Surgery
• Ifso (International Federation Of Surgery Of Obesity)
• National Turkish Association of Obesity Surgery
• National Turkish Obesity Research Association
• Espen (European Society For Clinical Nutrition And Metabolism)
• Kepan (Association of Clinical Enteral Parenteral Nutrition)

Medical Intrests

• Paediatric Bone Marrow Transplantation
• Paediatric Cardiac Surgery
• Paediatric Kidney Transplant
• Paediatric Liver Transplantation
• Postoperative Neurosurgery
• Postoperative Scoliosis Surgery
• Continuous Renal Replacement Therapy (CRRT-Hemodialysis, Haemofiltration and Haemodiafiltration)
• Plasma Exchange (TPE)
• Haemolytic Uremic Syndrome
• Guillain Barre Syndrome
• Trauma

Education

Assistant Doctor: Dr. Sami Ulus Child Health and Diseases Training and Research Hospital, 2005-2009
Specialist Doctor: Van Obstetrics and Gynecology and Children's Hospital, 2010-2011
Subspecialty Assistant Physician: Ankara University Faculty of Medicine, 2011-2014
Pediatric Intensive Care Specialist: Gaziantep Children's Hospital, 2015-2016
Dr. Lecturer. Prof. Dr. Member: Istinye University Faculty of Medicine and Istinye University Bahçeşehir Liv Hospital, 2017-2023
Assoc. Prof. Dr: Istinye University Faculty of Medicine and Istinye University Bahçeşehir Liv Hospital, 2023-2024
Pediatric Intensive Care Specialist: Biruni University Hospital, 2024-hal

Experience

Assistant Doctor: Dr. Sami Ulus Child Health and Diseases Training and Research Hospital, 2005-2009
Specialist Doctor: Van Obstetrics and Gynecology and Children's Hospital, 2010-2011
Subspecialty Assistant Physician: Ankara University Faculty of Medicine, 2011-2014
Pediatric Intensive Care Specialist: Gaziantep Children's Hospital, 2015-2016
Dr. Lecturer. Prof. Dr. Member: Istinye University Faculty of Medicine and Istinye University Bahçeşehir Liv Hospital, 2017-2023
Assoc. Prof. Dr: Istinye University Faculty of Medicine and Istinye University Bahçeşehir Liv Hospital, 2023-2024
Pediatric Intensive Care Specialist: Biruni University Hospital, 2024-present

Scientific Memberships
 

Pediatric Emergency and Intensive Care Association
International Nosocomial Infection Control Committee (INICC)
Turkish Medical Association
Turkish Pediatric Association

Medical Intrests 

• Psoriasis
• Atopic Dermatitis
• Chronic Urticaria
• Acne
• Rozase
• Follow-up and Treatment of Skin Tumours
• Dermoscopy
• Hair Diseases
• Nail Diseases
• Autoimmune Bullous Diseases
• Hidradenitis Supurativa
• Botulinum Toxin Applications
• Spot Treatment
• Face and Hair Mesotherapy
• Face and Scalp PRP Applications
• Laser Applications

Education

Degree: Faculty of Medicine (2nd place)
Department: Faculty of Medicine
Institution: Istanbul University
Year Range: 2011-2017

Experience

General Practitioner: Lütfiye Nuri Burat State Hospital Emergency Department (2017-2018)
Assistant Physician: Bezmialem Vakif University (2018-2023)
Specialist Physician: Cumra State Hospital (2023-2024)

Scientific Memberships

Turkish Dermatology Association
Skin and Venereal Diseases Association

Education

• Undergraduate: Faculty of Medicine, Istanbul University, 1993-1997
• M.Sc: Faculty of Medicine, Istanbul University, 1997-1999
• Specialization: Pediatrics, Ondokuz Mayıs University, 1999-2004
• Subspecialty: Pediatric Endocrinology, Ondokuz Mayıs University, 2004-2007
•  

Experience

• Ar.Gör. (Research Assistant): Ondokuz Mayıs University Faculty of Medicine, 1999-2004
• Research Assistant (Minor Research Assistant): Ondokuz Mayıs University Faculty of Medicine (Pediatric Endocrinology), 2004-2007
• Assist. Assoc. Dr.: Ondokuz Mayıs University Faculty of Medicine, 2007
• Uzm. Dr.: Gulhane Military Medical Academy (Military Service), 2007-2008
• Uzm. Dr.: Bakırköy Obstetrics and Gynecology Training and Research Hospital (Compulsory Service), 2008-2011
• Assoc: Bezmialem Vakif University Faculty of Medicine, 2011-2013
• Assoc. Dr.: Bezmialem Vakif University Faculty of Medicine, 2013-2018
• Prof. Dr.: Bezmialem Vakif University Faculty of Medicine, 2018-2023
• Prof. Dr.: Biruni University, 2023-
•  

Scientific Memberships

• National Pediatric Association
• Pediatric Endocrinology and Diabetes Association
•  

Awards

• Growth curves of Turkish girls with Turner syndrome: FAVOR Turner syndrome study group: 59th national pediatric congress 4-8 November 2015 ANTALYA PRIZE FIRST PRIZE FOR AN ORAL PRESENTATION
• Anthropometric findings and karyotype in Turner syndrome: National Turner syndrome database. 19TH UPEK 22-25 OCTOBER 2015. POSTER SECOND PRIZE
• Investigation of the Role of Irisin in the Pathophysiology of Puberty Precox in Female Rats. Esra Kutlu, İlker Tolga Özgen, Huri Bulut 24th UPEK Short Oral Presentation First Prize.
•  

Medical Interests

• -Growth Retardation
• -Puberty Problems (Early or Late Puberty)
• -Menstrual Irregularities in Adolescent Girls
• -Increased Hair Growth in Adolescent Girls
• -Diabetes
• -Obesity
• -Thyroid Problems
• -Pituitary Disorders
• -Genital Abnormalities
• -Micropenis and Gynaecomastia in Boys
• -Adrenal Gland Disorders

Education:

• Higher Education (6 Years): Marmara University Faculty of Medicine, 2001
• Specialization in Medicine: Istanbul University Istanbul Faculty of Medicine, 2007
   

Experience:

• Faculty of Medicine, University of Rostock, Department of Cardiac Surgery - Research Assistant, August 2007 - August 2008
• King Faisal Specialist Hospital and Research Center, King Faisal Heart Institute - Fellow, August 2008 - October 2008
• Private Göztepe Şafak Hospital, October 2008 - April 2009
• Private Esnaf Hospital, May 2009 - March 2010
• Düzce Atatürk State Hospital, March 2010 - September 2011
• Private Anadolu Medical Center Hospital, October 2011 - June 2013
• Istanbul University Istanbul Faculty of Medicine, July 2013 - December 2018
• Istanbul Medipol University Faculty of Medicine, January 2019 - April 2023
• Biruni University Faculty of Medicine, April 2023 - Present
•  
• Professor: December 18, 2020
• Associate Professor: April 16, 2015-December 18, 2020
• Specialist Doctor: November 2009- April 16, 2015
• Research assistant: June 2002 - July 2007
• Faculty of Medicine: Marmara University - English (1995-2001)[Diploma Grade: 75/100] - Listed in the World Directory of Medical Schools.

Awards:

Second best oral presentation award: Didem Melis Öztaş, Mert Meriç, Metin Onur Beyaz, Mehmet Akif Onalan, Shiraslan Bakhshaliyev, Kıvılcım Sönmez, Kerem Oter, Sedat Ziyade, Beyhan Ömer, Ufuk Alpagut, Murat Uğurlucan. Investigation of the Effect of Erythropoietin on Stem Cell Levels in Cardiovascular Tissue in Diabetic Rats. 19th National Vascular and Endovascular Surgery Congress, Kyrenia, Cyprus, October 26-29, 2019.

Medical Intrests

• Dermatooncology (Skin Cancers)
• Dermoscopy
• Psoriasis
• Atopic Dermatitis
•  

Education

Undergraduate Istanbul University Istanbul Faculty of Medicine 1975
Histology-Embriology Istanbul University Cerrahpaşa Faculty of Medicine 1975-1981
Skin and Venereal Diseases Istanbul University Cerrahpaşa Faculty of Medicine 1981-1984
Dermatology Istanbul University Istanbul Faculty of Medicine 1987

Experience

1975 Istanbul University Istanbul Faculty of Medicine
1975-1981 Histology-Embriology Cerrahpaşa Faculty of Medicine
1981-1984 Skin and Venereal Diseases Cerrahpaşa Faculty of Medicine
1987 Dermatology Associate Prof...Istanbul University Faculty of Medicineltesi
1987- 1993 Beyoğlu Training and Research Hospital Skin and Venereal Diseases Deputy Chief
1993-2010 Vakıf Gureba Training and Research Hospital Skin and Venereal Diseases Clinic Chief
2010-2024 Bezmialem Vakıf University Dermatology Department

Scientific Memberships

International Society of Dermatology
European Academy of Dermatology and Venerology
International Society of Dermoscopy
International Psoriasis Council
EORTC (European Cancer Research and Treatment Organization)
TüTurkish Dermatology Association
Board Member of Psoriasis and Cutaneous Inflammation Association
Chairmanship of Dermatooncology Working Group of Turkish Dermatology Association

Education 

2002 Haydarpaşa Numune Training and Research Hospital, Internal Medicine 

1990 Erciyes University, Faculty of Medicine 

Experience 

2019 - 2019 Okan University Hospital 

2018 - 2019 Ibn Sina Hospital 

2003 - 2018 Pendik State Hospital 

1997 - 2003 Haydarpasa Numune Hospital 

1990 - 1994 Erzincan State Hospital 

Istanbul Haydarpasa Numune Hospital 

Kartal Health Group Presidency 

Yıldırım Beyazıt Mother and Child Health Physician