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MRI Diagnosis of Brainstem Cavernous Angiomas Presenting as Tumours

Published online by Cambridge University Press:  18 September 2015

Mark C. Preul ,
Jean-Guy Villemure ,
Richard Leblanc  and
Raquel del Carpio-O’Donovan
Mark C. Preul
Affiliation:
Divisions of Neurosurgery, Montreal Neurological Institute and Hospital, McGill University, Montreal
Jean-Guy Villemure*
Affiliation:
Divisions of Neurosurgery, Montreal Neurological Institute and Hospital, McGill University, Montreal
Richard Leblanc
Affiliation:
Divisions of Neurosurgery, Montreal Neurological Institute and Hospital, McGill University, Montreal
Raquel del Carpio-O’Donovan
Affiliation:
Divisions of Neuroradiology, Montreal Neurological Institute and Hospital, McGill University, Montreal
*
Division of Neurosurgery, Montreal Neurological Institute and Hospital, 3801 University St., Montreal, Quebec, Canada H3A 2B4
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Abstract:

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We report experience with 11 patients misdiagnosed for years, on the basis of computed tomography (CT) and angiography, as harbouring brainstem tumours in whom magnetic resonance imaging (MRI) demonstrated cavernous angiomas. Seven had undergone external irradiation, 2 had a ventriculo-peritoneal shunt, 2 developed aseptic femur necrosis following corticosteroid treatment, 1 had undergone a biopsy with a pathological diagnosis of glioma. CT had depicted ill-defined, hyperdense, faintly enhancing lesions. Angiography was normal, or showed an avascular mass or subtle venous pooling. MRI delineated discrete lesions, typical of cavernous angiomas, with a mixed hyperintense, reticulated, central core surrounded by a hypointense rim. Six patients subsequently underwent stereotactic radiosurgery without changes in clinical status or lesion. Although hemorrhagic neoplasms may mimic the clinical course and MRI appearance of cavernous angiomas, MRI is useful in the diagnosis of brainstem cavernous angiomas and should be performed in patients with suspected brainstem tumours.

Type
Articles
Information
Canadian Journal of Neurological Sciences , Volume 19 , Issue 3 , August 1992 , pp. 376 - 382
Copyright
Copyright © Canadian Neurological Sciences Federation 1992

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