[Transfacial accesses to tumors of the clivus].

Treatment of 3 patients with malignant tumors of the skull base using transfacial accesses as half maxilotomy by the Kosson access and access with osteotomy of a nasoorbital complex was analyzed that provided a possibility to ablate large and gigantic tumors of the localization in question using the operative microscope and a traditional instruments' kit.