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Follow-up imaging studies obtained two months after the initial onset of symptoms (August 2011). (A) A T2-weighted MR image reveals a chronic hematoma with extensive surrounding edema in the left frontal area. (B) There are newly emerging conglomerated, bubbly enhancing lesions at the posterior aspect of the hematoma on a contrast-enhanced T1-weighted MR image (arrows). (C) A FDG-PET image reveals a metabolic defect in the left frontal lobe (arrowheads).
