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MRI findings of intracranial cystic meningiomas

D Zhang1, L-B Hu, J W Zhen

  • 1Department of Radiology, XinQiao Hosptial, Third Military Medical University, ChongQing 400037, P. R. China.

Clinical Radiology
|July 11, 2009
PubMed
Abstract

Insights

Magnetic resonance imaging (MRI) reveals distinct features for intra- and peritumoural cystic meningiomas. This study differentiates these rare intracranial tumors based on cyst location, size, and enhancement patterns.

Area of Science:

  • Neurology
  • Radiology
  • Oncology

Background:

  • Cystic meningiomas are uncommon intracranial tumors.
  • Differentiating cystic meningiomas from other cystic lesions is crucial.

Purpose of the Study:

  • To characterize the magnetic resonance imaging (MRI) features of intracranial cystic meningiomas.
  • To compare MRI findings between intratumoural and peritumoural cystic meningiomas.

Main Methods:

  • Retrospective analysis of 14 peritumoural and 18 intratumoural cystic meningiomas.
  • All patients underwent non-enhanced and contrast-enhanced MRI.
  • Assessment of tumor location, size, signal intensity, enhancement, and cystic changes.

Main Results:

  • Solid components showed moderate to marked enhancement.
  • Enhanced cyst walls were observed in peritumoural but not intratumoural cysts.
  • Peritumoural cysts were larger and located predominantly in the cerebral falx; intratumoural cysts were smaller and in the frontal convexity.
  • Peritumoural edema was more common with intratumoural cysts.

Conclusions:

  • Intracranial cystic meningiomas require differentiation from other cystic lesions.
  • Intra- and peritumoural cystic meningiomas exhibit distinct MRI characteristics.
  • Novel findings include solid parts within cysts and calcified nodules with hemorrhage.

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