Cystic Meningioma Simulating Arachnoid Cyst: Report of an Unusual Case

Figure 2

Gadolinium-enhanced brain MRI. The lesion is hypointense on T1- and hyperintense on T2-weighted images (asterisk). Signal intensity is high on FLAIR images probably due to the cyst protein content. A small mural nodule is observed. After gadolinium administration, enhancement of the small mural nodule (white arrow) and of the peripheral cystic area is observed. There is a small hyperintense area on T2-weighted and FLAIR images (red arrow) around the medial aspect of the cyst, probably related to the presence of reactive gliosis.