Microcystic/Reticular Schwannoma of the Frontal Lobe: An Unusual Occurrence

Figure 1

Precontrast axial (a), postcontrast axial (b), and postcontrast left parasagittal (c) T1-weighted MR images of the brain demonstrate an intra-axial left frontal mass with heterogeneous internal nodular and septal enhancement. The largest enhancing component is subjacent to markedly thinned medial left frontal cortex. T2-weighted axial images (d) demonstrate hyperintense cystic formation with near complete suppression on FLAIR sequences (e). No peritumoral T2 hyperintensity is present to suggest vasogenic edema or gliosis. Details from high-resolution, heavily T2-weighted images (f) redemonstrate mixed solid and cystic components and thin internal septation. No elevated perfusion or abnormally restricted diffusion was identified on MR perfusion or diffusion-weighted imaging, respectively (not shown).

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