Brain parenchymal signal abnormalities associated with developmental venous anomalies: detailed MR imaging assessment.
AJNR Am J Neuroradiol
; 29(7): 1317-23, 2008 Aug.
Article
en En
| MEDLINE
| ID: mdl-18417603
ABSTRACT
BACKGROUND AND PURPOSE:
The occurrence of brain parenchymal signal-intensity changes within the drainage territory of developmental venous anomalies (DVAs) in the absence of cavernous malformations (CMs) has been incompletely assessed. This study was performed to evaluate the prevalence of brain parenchymal signal-intensity abnormalities subjacent to DVA, correlating with DVA morphology and location. MATERIALS ANDMETHODS:
One hundred sixty-four patients with brain MR imaging with contrast studies performed from July 2005 through June 2006 formed the study group. The examinations were reviewed and data were collected regarding the following location, depth, size of draining vein, associated increased signal intensity on fluid-attenuated inversion recovery and T2-weighted images, associated CMs, and associated signal intensity on gradient recalled-echo sequences.RESULTS:
Of the 175 DVAs identified, 28 had associated signal-intensity abnormalities in the drainage territory. Seven of 28 DVAs with signal-intensity abnormalities were excluded because of significant adjacent white matter signal-intensity changes related to other pathology overlapping the drainage territory. Of the remaining DVAs imaged in this study, 21/168 (12.5%) had subjacent signal-intensity abnormalities. An adjusted prevalence rate of 9/115 (7.8%) was obtained by excluding patients with white matter disease more than minimal in degree. Periventricular location and older age were associated with DVA signal-intensity abnormality.CONCLUSION:
Signal-intensity abnormalities detectable by standard clinical MR images were identified in association with 12.5% of consecutively identified DVAs. Excluding patients with significant underlying white matter disease, we adjusted the prevalence to 7.8%. The etiology of the signal-intensity changes is unclear but may be related to edema, gliosis, or leukoaraiosis secondary to altered hemodynamics in the drainage area.
Texto completo:
1
Colección:
01-internacional
Asunto principal:
Venas Cerebrales
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Procesamiento de Imagen Asistido por Computador
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Edema Encefálico
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Neoplasias Encefálicas
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Imagen por Resonancia Magnética
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Angioma Venoso del Sistema Nervioso Central
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Imagen de Difusión por Resonancia Magnética
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Leucoaraiosis
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Gliosis
Tipo de estudio:
Observational_studies
/
Prognostic_studies
Límite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
AJNR Am J Neuroradiol
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos