Various changes in the ear, nose, paranasal sinuses, pharynx and larynx can be secondary in nature, often being symptoms of a number of common diseases. The subject of study of otorhinolaryngology is the diagnosis, treatment and prevention of diseases of the upper respiratory tract and ear in connection with other pathology, as well as issues of physiology and pathology of the nose, pharynx, larynx and ear in their interaction with all organs and systems of the body. Mastering the methodology and technique of endoscopic examination of ENT organs; the study of the symptoms and syndromes of diseases of ENT organs.