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There is a 23mm x 21mm x 20mm vividly enhancing, lobulated lesion, left of midline and likely extra-axial in origin within the anterior cranial fossa. No vessels are seen to feed into or drain from this lesion. Surrounding hypoattenuation consistent with oedema. It is difficult to appreciate whether there is a dural tail associated with this lesion. No other intra or extra-axial abnormality.
Conclusion: Findings are most consistent with a solid tumour and in this location a meningioma (olfactory groove) is by far the most likely. An aneurysm is considered unlikely. The findings are not consistent with an abscess or infective process. The patient will proceed to MRI for further characterisation.