Ependymomas of the posterior cranial fossa: CT and MRI findings

P. Tortori-Donati, M. P. Fondelli, A. Cama, M. L. Garrè, A. Rossi, L. Andreussi

Research output: Contribution to journalArticle

Abstract

We studied nine children with posterior cranial fossa ependymomas to identify specific neuroradiological features. Patients were studied preoperatively with CT and MRI; T1-, T2-and proton-density (PD)-weighted images were obtained. All children underwent surgery and a definite histopathological diagnosis was made. All the tumours grew into the fourth ventricle and caused dilatation of its upper part, which resembled a cap. All but one were separated from the vermis by a cleavage plane. In eight cases there was desmoplastic development through the foramina of the fourth ventricle, and five were heterogeneous due to necrosis and cystic change; one had a haemorrhagic area. In most cases the solid portion was isointense with grey matter on T1-weighted images, hyperintense on PD weighting, and isointense on T2-weighted images. On CT the tumour was isodense in six cases and calcification was detected in four. The presence of both desmoplastic development and a tumour/vermis cleavage plane in a posterior cranial fossa tumour isodense on CT is highly suggestive of ependymoma.

Original languageEnglish
Pages (from-to)238-243
Number of pages6
JournalNeuroradiology
Volume37
Issue number3
DOIs
Publication statusPublished - Apr 1995

Keywords

  • Brain tumours
  • Children
  • Computed tomography
  • Ependymoma
  • Magnetic resonance imaging
  • Posterior cranial fossa

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

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