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Radiology, Vol 157, 367-372, Copyright © 1985 by Radiological Society of North America

ARTICLES

Supratentorial ependymoma: CT appearance

WG Armington, AG Osborn, DA Cubberley, HR Harnsberger, R Boyer, TP Naidich and RG Sherry

The computed tomographic appearances of 22 biopsy-proved supratentorial ependymomas were analyzed. Supratentorial ependymomas were usually intraparenchymal, larger than 4 cm, and cystic. Contrast enhancement was moderate to intense, with homogeneous or ring-enhancement patterns commonly seen. Intratumoral calcification was present in one-third of the cases, while hydrocephalus and peritumoral edema were seen in 50%. Intratumoral hemorrhage was not a characteristic of the lesion. In contrast to cellular ependymomas, malignant ependymomas and ependymoblastomas demonstrate higher attenuation prior to administration of contrast material, more intense enhancement, lower frequency of calcification within the tumor, and less distinct margination.


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