The objective of this study is to increase the efficacy of lateral skull base paragangliomas surgical treatment. In this article the authors present the result of 20 cases of surgery in patients with lateral skull base paragangliomas. Five patients with C2–С3 tumors (according to the classification suggested by U. Fisch and D. Mattox) underwent surgery using type A infratemporal fossa approach. Good functional results have been obtained, the function of the lower cranial nerves has been saved. In 5 patients the facial nerve palsy restored to the level 3 according to House-Brackmann classification system. No cases of tumor recurrence in the postoperative period (the maximum follow-up period was 16 month) have been observed. Using the infratemporal fossa approach during lateral skull base paragangliomas excision provides complete removal of the neoplasm, visualization and avoidance of the VII, IX–XII cranial nerves injure and prevention of tumors intracranial extension and the internal carotid artery damage.

The article focuses on the surgical treatment of the patients with the new-onset cochlear form of otosclerosis, and the patients, in which, according to the tonal threshold audiometry, a significant sensorineural hearing loss had occurred after stapedotomy. This article provides an algorithm of differential diagnostic of the primary (true) and the secondary (false) sensorineural hearing loss, comprising the sensorineural hearing loss component revealed in the patients with the cochlear form of otosclerosis. The authors present detailed description of the method of stapedectomy with substitution of a part of perilymph with physiological saline solution, providing its theoretical substantiation and the preliminary functional results of the surgery.

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Van der Hoove syndrome is an inherited genetically determined generalized connective tissue disorder characterized by the formation of „pathologically immature type I collagen“. The literature describes the results of cochlear implantation in patients with van der Howe syndrome, after which there are often complications both intraoperative and postoperative. This article describes two clinical cases of van der Howe syndrome with severe hearing loss and deafness. In cases described: preoperative diagnosis and features of the surgical stage of cochlear implantation and postoperative results. Diagnostic features – thinning of bone tissue according to CT of temporal bones, expansion of cochlear duct, deafness according to tonal threshold audiometry. Cochlear implantation performed with the use of the endotracheal anesthesia under the control of the microscope, straight electrode grids were used, testing was normal. A distinctive feature of this syndrome is the softness of the cochlea’s bone tissue, the danger is that when the electrode array is inserted, it may fall outside the cochlea. Also, during the first connection or later, there may be pathological stimulation of the facial nerve.

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