Étude Radiologique Des Gliomes Infiltrants Du Tronc Cérébral

Differential diagnosis of fourth ventricle tumors from brain stem tumors in angiography

“…5, 6) displace vessels toeated on the anterior aspect of the brain stem forward. The angle formed by the mesencephalic and pontine segments of the anterior pontomesencephalic vein at the superior foramen caecum is often blunted or increased and i{s apex elevated in brain stem tumors, whereas this angle is usually more acute or decreased in fourth ventricle tumors [13,14]. 7,8,9,10).…”

“…In brain stem tumors, tumor nodules often fungate from the surface of the enlarged pons and bulge forward into the pontine cistern lateral to the basilar artery [14]. Upon reaching the elivus, these pseudoextra-axial nodules displace the enlarged pons backward, carrying the basilar artery and the midline anterior pontomeseneephalie vein with it.…”