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American Journal of Roentgenology, Vol 152, Issue 3, 609-614
Copyright © 1989 by American Roentgen Ray Society

Articles

MR and CT of masses of the anterosuperior third ventricle

GA Waggenspack and FC Guinto Jr

Department of Radiology, University of Texas Medical Branch, Galveston 77550-G09.

Six patients with masses of the anterosuperior portion of the third ventricle were imaged with MR and CT. Four patients had proved colloid cysts, one patient had a proved astrocytoma, and one patient had a presumed colloid cyst. Multiplanar MR imaging provided accurate localization of the anterosuperior third-ventricle mass in all cases. The MR intensity characteristics of the colloid cysts varied and the astrocytoma could not be differentiated from the colloid cysts on MR. The astrocytoma contained a calcification that was clearly demonstrated on CT but was difficult to appreciate on MR. Neither MR nor CT was useful in predicting success of stereotactic aspiration of the colloid cysts in this small series, but the presence of thin, low-viscosity cyst contents could be suggested by both examinations.
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Copyright © 1989 by the American Roentgen Ray Society.