J Korean Radiol Soc.  1995 Jul;33(1):35-41.

MRI Findings of Intracranial IVleningioma: Significance of Gd-DTPA Enhancernent

• Kim SM
• Kim JM
• Chang HK
• Kwon SO
• Kim SS
• Oh GS
• Jung CP

Abstract

PURPOSE
To assess the usefulness of Gd-DTPA MRI in the evaluation of the characteristics of intracranial meningiomas and in the correlation with their histopathologic pattern.
MATERIALS AND METHODS
We retrospectively analyzed the Gd-DTPA MRI findings in 22 cases of histologicalty-proven intracranial meningiomas. The images were assessed for signal intensity, internal texture, peritumoral edema, and enhancement characteristics. Computed tomograms were obtained in 18 cases and compared with MRI findings.
RESULTS
Tl-weighted images were not particularly useful for discriminating pathologic subtype, but signal intensity on T2-weighted images were relatively well correlated with histopathologic findings. A heterogeneous texture produced by tumor vascularity, calcification, cystic foci, hemorrhagic necrosis, or psammoma body was relatively well shown on Gd-DTPA Tl-weighted image compared with that on T1- or T2-weighted image. Gd-DTPA Tl-weighted images revealed a dural tail sign in 19 cases(83%). Angioblastic type was slightly hypointense on Tl-weighted image and markedly hyperintense on T2-weighted image. Psammomatous type and firboblastic type were isointense on both T1- and T2-weighted image. Fibroblastic type was more densely enhanced than the other. The transitional, atypical, and papillary types showed tendency of heterogeneous enhancement.
CONCLUSION
Gd-DTPA MRI was a useful imaging modality in evaluation of the characteristics of meningiomas and correlated well with the pathologic patterns.

MeSH Terms

Edema
Fibroblasts
Gadolinium DTPA*
Magnetic Resonance Imaging*
Meningioma
Necrosis
Retrospective Studies
Gadolinium DTPA