New parameters in the radioanatomy of the deep cerebral venous system. Angiographic classification of intracranial tumors with respect to the phleboaxial line.

The usually observed modifications of the deep phlebogram in the entire pathological series are: transmedial displacement of the internal cerebral vein (more or less evident but always significant), straightening of the superior arch of the internal cerebral vein, an important ventricular dilatation in most cases. The most reliable parameters are: Fisher's bisecting line and two of the parameters proposed by the author's: Monro-Phleboaxial-Line and Monro-Glabella-Bregma-Angle.