A practical approach to the phlebographic study of the lateral cerebral ventricles.

The main anatomical features of the subependymal veins of the lateral ventricles are summarized. The important role of the subependymal veins for the study of the size and shape of the lateral ventricles is outlined. The most typical modifications which occur in cases of ventricular enlargement or ventricular deformation due to cerebral tumors are illustrated. The importance of the criteria to be followed for the exact identification of the lateral and medial veins to each ventricular portion are stressed. This is possible thanks to the combined study of the phlebograms in the right angled projections.