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 Specialized Cancer Hospital "Metaxa," in Plastic Surgery at the Athens General Hospital "Georgios Gennimatas," in Neurosurgery at the Piraeus General Hospital "Tzaneio," and in General Surgery at the Pyrgos General Hospital "Andreas Papandreou." It is noteworthy that he has worked as an Otolaryngologist at the Piraeus Specialized Cancer Hospital "Metaxa," served as an External Collaborator at the Athens General Hospital "Hippocratio," and was Consultant at the ENT Clinic of the 492 General Military Hospital of Alexandroupolis. Currently, he is Deputy Director of the ENT Clinic at the Euroclinic Children's Hospital of Athens and serves as Consultant in the corresponding Clinic of Bioclinic Athens. As part of his continuous professional development, he has attended numerous seminars and participated in many scientific conferences with poster presentations. At his private practice, he offers a wide range of services such as tympanometry, audiometry, acoustic reflex testing, ear cleaning, otomicroscopy, as well as endoscopy of the nose, pharynx, and larynx. Additionally, he conducts snoring evaluation, chemical and electrical cauterization of the nose, labyrinth examination, and minor surgical procedures.