FIELD: medicine. SUBSTANCE: method involves taking saliva sample, drying it on a surface and determining cholesterol crystals availability in the sample under microscopic examination. The saliva sample is taken from patient on the empty stomach after doing chewing movements during 10-15 min. In performing the microscopic examination, additional inclusions of foreign structures into cholesterol crystals are to be determined. Their presence being revealed, aggressive nature of the middle ear cholesteatoma is to be diagnosed. EFFECT: high reliability of the diagnosis. 2 dwg
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