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Radiology, Vol 145, 71-78, Copyright © 1982 by Radiological Society of North America

ARTICLES

Computed tomography of tumors involving the atria of the lateral ventricles

AJ Silver, SR Ganti and SK Hilal

Computed tomograms, angiograms, and operative findings in 18 intra- atrial and 6 para-atrial lateral ventricle tumors were reviewed. Intra- atrial tumors were characteristically homogeneous, with an intraluminal mass effect. The benign types engulfed the choroid glomus; on angiography, the choroidal arteries were enlarged, with a definite tumor blush. Intra-atrial tumors without choroid involvement were usually gliomas. Para-atrial tumors had a low-density center on CT scans (in adults) with an extraluminal mass effect, displaced the glomus, and were avascular on angiography. They were low-grade gliomas in adults and ependymoblastomas in children. Forty non-atrial paraventricular and intraventricular masses were also reviewed. In general, an intraventricular, homogeneous mass which engulfs the choroid glomus on CT and has a significant choroidal artery supply on angiography is of choroidal origin and likely to be benign.


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