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Journal of Clinical Radiology. 2010, (08) Core

The Diagnostic Value of the Halo Sign and the Hypointense Signal Rim on MRI in Differentiation of Cavernous Angioma from Other Hemorrhagic MassesChinese Full Text

YANG Wanqun, HUANG Biao, LIU Hongjun,et al.Department of Radiology,Guangdong General Hospital,Guangdong Academy of Medical Sciences,Guangzhou,Guangdong Province 510080,P.R.China

Abstract: Objective To determine whether halo sign and T2 hypointense signal rim are useful for the differentiation of cavernous angioma from other hemorrhagic cerebral masses. Materials and Methods The MR images of 84 patients with acute or subacute cerebral hemorrhagic lesions with perilesional edema （29 cavernous angiomas,31 high grade astrocytomas,24 metastatic tumors） were retrospectively evaluated for the presence of the halo sign and T2 hypointense signal rim. Results The halo sign was found in 17 （58.62%） of 29 cavernous angiomas,in 4（16.67%） of 24 metastases,and in 3（9.68%） of 31 astrocytomas. Sensitivity,specificity,and positive predictive value of this sign for cavernous angioma were 58.62%,87.27% and 70.83%,respectively. The profoundly T2 hypointense signal rim was found in 59 of 84 patients,which included 26 patients with cavernous angioma,15 patients with astrocytoma and 18 patients with metastasis. The sensitivity,specificity and the positive predictive value of this sign for cavernous angioma were 89.66%,40% and 44.07%,respectively. The area under the ROC curve for the both signs was 0.766. Conclusion The halo sign is a specific sign in cavernous angioma,while T2 hypointense signal rim is very sensitive but not very specific in cavernous angioma.If these two signs are analyzed together,it would be very useful in differentiating cavernous angioma from other hemorrhagic cerebral tumors.
Keywords：

Cavernous angioma Hemangioma Neoplasm metastasis Magnetic resonance imaging Diagnosis;

  • DOI：

    10.13437/j.cnki.jcr.2010.08.031

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  • Classification Code：

    R739.4

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