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Technique: Multiplanar, multisequence imaging has been obtained through the brain including pre and post contrast sequences, MR perfusion and MR spectroscopy.
Comparison: Outside scan from one month ago.
Findings: An area of signal change on the FLAIR and T2 with slight positive mass effect is identified in the medial and anterior aspect of the superior left frontal gyrus. Signal change extends into the cortex which is also is thickened.
A leading-edge of signal abnormality extending down to the ventricle is not clearly identified but would necessitate high-resolution 3-D FLAIR imaging
No contrast-enhancement in associated with the lesion. No raised cerebral blood volume (CBV). MR spectroscopy shows a decrease of metabolites without increased choline and without increased myoinositol peak.
No other lesions are identified
Conclusion: An area of signal abnormality with mass effect is present within the superior frontal gyrus on the left. Differential diagnosis lies between cortical dysplasia and low-grade glioma. Spectroscopic findings would favour cortical dysplasia.