PMC8349247_01
FLAIR (a) and T1 postcontrast (b) MRI images showing dural-based enhancing (b) lesion with associated FLAIR hyperintensity (a). Histology shows angiomatous (c), microcystic (d), and histology with brain invasion (e) as highlighted by GFAP (glial fibrillary acidic protein) immunostain (f). Original magnification (c)-(f): 200x.
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Subsequently, an MRI with contrast showed an extra-axial tumor along the left frontal midconvexity measuring 32.3 x 28 mm, associated with FLAIR hyperintensity (Figures 1(a) and 1(b)). Histologic examination revealed an atypical meningioma with predominance of angiomatous and microcystic morphology and foci of brain invasion (Figures 1(c)-1(f)).