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RT Journal Article
SR Electronic
T1 Parenchymal Hypointense Foci Associated with Developmental Venous Anomalies: Evaluation by Phase-Sensitive MR Imaging at 3T
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1940
OP 1944
DO 10.3174/ajnr.A3495
VO 34
IS 10
A1 Takasugi, M.
A1 Fujii, S.
A1 Shinohara, Y.
A1 Kaminou, T.
A1 Watanabe, T.
A1 Ogawa, T.
YR 2013
UL http://www.ajnr.org/content/34/10/1940.abstract
AB BACKGROUND AND PURPOSE: The risk of hemorrhage in the context of developmental venous anomaly is considered to be very low, but it has never been evaluated by susceptibility-weighted MR imaging at 3T. The goal of the present study was to evaluate the prevalence of hypointense foci (ie, microhemorrhage or cavernous malformation) associated with DVA on phase-sensitive MR imaging, on the basis of principles similar to those of susceptibility-weighted MR imaging, and to evaluate the relationship between the hypointense foci and several factors, such as white matter hyperintense lesions adjacent to DVA on T2-weighted imaging, DVA morphology, and clinical symptoms. MATERIALS AND METHODS: This study retrospectively evaluated 61 lesions in 59 consecutive patients with DVA who underwent MR imaging including phase-sensitive MR imaging. Two neuroradiologists independently assessed for the presence of hypointense foci and other factors such as DVA location, depth, size, direction of draining vein on phase-sensitive MR imaging, and white matter hyperintense lesion on T2-weighted imaging. Clinical symptoms were also assessed. RESULTS: Hypointense foci were observed in 62.3% (38/61) of lesions. White matter hyperintense lesion was more frequently observed in patients with hypointense foci (26/38) than in patients without hypointense foci (7/23) (P &lt; .01). There was no significant association between hypointense foci and other factors. CONCLUSIONS: Our results support the hypothesis that microhemorrhage or cavernous malformation can be related to venous congestion caused by abnormal venous drainage. We conclude that phase-sensitive MR imagingis useful for the detection of microhemorrhage or cavernous malformation in patients with DVA, especially when associated with white matter hyperintense lesion. CMcavernous malformationDVAdevelopmental venous anomalyICHintracranial hemorrhagePSIphase-sensitive MR imagingWMHwhite matter hyperintense lesion