Misinterpretation of the adhesio interthalamica and the commissura epithalamica (posterior) in occlusive hydrocephalus in the computed tomogram
Hussein, S.; Becker, H.
Der Radiologe 30(2): 75-78
1990
ISSN/ISBN: 0033-832X PMID: 2320729 Document Number: 359722
As a cause of an occlusive hydrocephalus, sometimes by CT a cystic malformation of the third ventricle is falsely assumed. This misinterpretation is based on the enlargement of the ventricular system, which leads to an unusual visualization of the interthalamic adhesion and the epithalamic (posterior) commissure. We show these structures to be the reason for the misleading diagnosis by comparing anatomical sections, ventriculography and magnetic resonance imaging (MR) with each other. Finally we discuss the clinical significance by presenting cases, in which an operative treatment of the so called "cyst" already had been planned. For the definite diagnosis we favor MR.