Hyperacute intraparenchymal hematoma
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T1 isointense and T2 hyperintense signal lesion (3.3 x 2 cm) showing central diffusion restriction and peripheral rim of blooming artefact (in T2* GRE sequence) in the right inferior frontal gyrus. FLAIR demonstrates a fluid-fluid level posteriorly.
Mild surrounding vasogenic edema is noted.
The rest of the brain parenchyma is normal.
The images demonstrate a hyperacute intraparenchymal hemorrhage, but no MRI detectable cause was identified. An underlying vascular malformation (most likely) or tumor are likely to be present (unless there were other systemic illnesses or factors that are currently unknown e.g. malignant hypertension, trauma, drug abuse).
In any case further assessment with angiography and followup imaging is required.