- Prof. Dr. Büyükünal carried out professional work in the United States and England.
- A total of 202 articles, 75 in international journals and 127 in national journals, have been published. Presented papers at approximately 500 national and international congresses. Served as editor and chapter author in 15 books.
- Holds the proficiency certificates of the European Society of Pediatric Surgery and the European Society of Pediatric Urology; Editor-in-Chief of Çocuk Cerrahisi Dergisi. Advisor to the journals Journal of Pediatric Surgery and Pediatric Surgery International.
- Honorary member of the Royal College of Surgeons (UK) and the Egyptian Pediatric Surgery Society. Member of the European Society for Pediatric Urology (ESPU), European Pediatric Surgeons' Association (EUPSA), International Society of Pediatric Oncology, International Society of Pediatric Surgical Oncology, British Association of Pediatric Surgeons (BAPS), Pediatric Urology Society (PEDURO), Turkish Pediatric Surgery Society (TÇCD), and American Academy of Pediatrics (AAP). Board member of the European Academy of Pediatric Urology (EAPU) (2013-2019).
- Prof. Dr. Büyükünal, who received the Eczacıbaşı Science Award in 1987 and 1989, has 8 scientific awards, 4 of them international.
- Special interests: collection of pictures of Atatürk and children, medical figurines, collection of dolls and puppets, collection of toy ambulances, collection of postcards related to hospitals in Turkey.
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