https://www.selleckchem.com/products/cdk2-inhibitor-73.html Nowadays, endoscopic transcanal otosurgery with confident steps is becoming a practice. Obviously, any new method of intervention needs to be repeatedly tested by the surgeon before it is used on the patient. This is why dissection work is so important and popular. Working on biomaterial sets itself several tasks training manual skills of working with an endoscope and an instrument in the middle ear cavities, stage-by-stage training for performing specific interventions, detailed analysis and repetition of anatomy and topography of structures. This article presents a step-by-step dissection algorithm with an analysis of the anatomical landmarks of each area, such as the prototype. The proposed training protocol allows practicing such interventions as endaural atticotomy, types of ossiculoplasty, stapedoplasty, decompression of the facial nerve to the geniculate ganglion area, infracochlear and transpromontorial approaches to the internal auditory canal. Keywords endoscopic otosurgery, transcanal otosurgery, chronic otitis media, otitis media, otitis media in children, otodissection, endoscopic otodissection. The main aim of the work was to describe a rare clinical case of osteoma of inferior turbinate. The interest of the case is that such tumors are extremely rare. A female patient of 63 years old attended an ENT clinic. She complained on absence of nasal breath at the right side and headache. After a full ENT-examination, anamnesis, and a thorough analysis of the radiation examination results (computed tomography data), a decision was made to surgical treatment. Under general anesthesia, controlled hypotension surgery was done. First step was septoplasty, then the dense bone tumor was reduced and removed. At the control examination in 3 months, the complete removal of the formation of the inferior turbinate on the right is determined. There were no signs of continued or recurrent tumor growth. Neoplasms o