Demographics:
65 years old, Female
Indication:
Headache
Findings
CT
- Large, mildly hyperattenuating extra-axial mass centered at midline in the anterior cranial fossa
- Corresponding calcification and adjacent hyperostosis along the olfactory groove
- Vasogenic edema in the adjacent left frontal lobe
- Associated mass effect on the frontal lobes, genu of the corpus callosum, and frontal horns of the lateral ventricles without herniation or hydrocephalus
MRI
- T1 hypointense, T2 isointense extra-axial mass centered in the anterior cranial fossa overlying the olfactory groove
- Diffuse enhancement with radiating internal vascularity
- Diffuse internal restricted diffusion
- Areas of susceptibility artifact corresponding with the areas of calcification seen on CT
- T2/FLAIR signal hyperintensity in the adjacent left frontal white matter
- Posterior displacement of the anterior cerebral arteries
- Possible contacting of the prechiasmatic optic nerves along the inferior margin of the mass
Diagnosis
Meningioma
Key Imaging Features
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Differential Diagnosis
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Discussion
Pearls
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References