There are cholesteatoma (primary), retention, atretic and retention-atretic (mixed) fistulas. In all cases, external (external growth) fistulas of the ear and ear are cholesteatoma; internal auditory canal; nasal cavity and nasopharynx; external part of the vomeronasal canal. Cholestatoma is a neoplasm of the epidermal layer of the cartilaginous plate of the middle ear. The process can be characterized as the embryonic development of cartilage with a predominance of cartilaginous tissue over connective tissue. The cholestatic mass is a thin layer of cartilage 1-3 mm thick. All of these formations can occur and are observed in an asymptomatic stage (asymptomatic fistulas) and cause frequent diseases (chronic epitympanums, paracenteses and other otoantrial complications). According to D.I. Lukomsky, V.I. Kochergin, N.Zh. Solomatin (1965), the first symptoms of inflammation accompanying a fistula appear after 4-5 years. Frequent exacerbations of the inflammatory process, along with periodic bloody discharge and tissue atrophy, are indispensable companions