Polykretis Leonidas is a Surgeon Otolaryngologist, Pediatric ENT specialist with a private practice in Dafni, Director of the ENT Clinic at IASO Children's Hospital. He graduated from the Medical School of the University of Patras and holds certification in "Advanced Trauma Life Support (ATLS)" from the American College of Surgeons (ACS). He specialized in Otolaryngology at the Children's Hospital "Agia Sofia" and at the Piraeus Specialty Anti-Cancer Hospital "Metaxa", in Plastic Surgery at the General Hospital of Athens "Georgios Gennimatas", in Neurosurgery at the General Hospital of Piraeus "Tzaneio" and in General Surgery at the General Hospital of Pyrgos "Andreas Papandreou". It is worth noting that he has worked as an Otolaryngologist at the Piraeus Specialty Anti-Cancer Hospital "Metaxa", was an External collaborator of the General Hospital of Athens "Hippocrateion", and served as Registrar of the Otolaryngology Clinic at the 492 General Military Hospital of Alexandroupolis. Currently, he is Deputy Director of the Otolaryngology Clinic at the Euroclinic Children's Hospital of Athens and serves as Registrar in the corresponding Clinic of the Bioclinic of Athens. In the framework of his continuous training, he has attended numerous seminars and participated in numerous scientific conferences with poster presentations. At his private practice, he provides a wide range of services, including tympanometry, audiometry, acoustic reflex testing, ear cleaning, otomicroscopy, as well as nasal, pharyngeal, and laryngeal endoscopy. Additionally, snoring evaluation, chemical and electrical cauterization of the nose, labyrinth examination, and minor surgical procedures are performed.