The authors investigated the epidemiological and clinical features of otogenic and rhinosinusogenic intracranial complications in East-Siberian region of Russian Federation. The rate of intracranial complications consisted of 0,2±0,1% in patients of ENT hospitals in Sakha- Yakutia, Krasnoyarsk Territory, Irkutsk Region, Republic of Tuva. The intracranial inflammatory pathology of otogenic nature was diagnosed two times more frequent than rhinosinusogenic. Meningitis was revealed at the same rate as lesions of brain substance (encephalitis, epi- and subdural abscesses). The high clinical efficacy was shown in surgical treatment of purulent polysinusitis using W. Messerklinger method of functional endoscopic rhinosinusosurgery (FESS). The method of transtemporal incision and drainage of otogenic abscess of the brain temporal lobe has a number of essential defects, because of them, the indications for application of this method should be considered and specified. It is necessary to have an interdisciplinary approach and use the modern achievements of medical science in order to develop the efficacy of treatment of given category of patients.