[Alternative ways of collateral venous flow in occlusion of superior sagittal sinus].

The authors demonstrated alternative ways of bloodflow from occluded superior sagittal sinus through hypertrophic dural veins (middle meningeal veins) and sphenoparietal sinus. Parameters of bloodflow were evaluated using triplex ultrasonography. The possibility of venous drainage into anterior segment of superior sagittal sinus proximal to the site of occlusion with further retrograde flow towards dural venous anastomosis is verified.

[Metastatic glioblastoma in a submandibular lymph node (a rare case)].

Extraneural metastases from glioblastoma are rare. A case of metastatic right parietal lobe glioblastoma in cervical node after repeat craniotomy is presented.

[Modern classification approach to central nervous system tumors].

Central nervous system (CNS) tumors cannot be, for a number of reasons, organically included into the existing tumor classification system - TNM. This hampers the registration and systematization of CNS tumors, the acquisition of valid data on their prevalence, and the organization of treatment in patients with CNS tumors. A variant of a classification of CNS tumors is proposed, which takes into account the specific features of this group of neoplasms.