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Axial (A) and sagittal (C) 3D gadolinium enhanced fat saturated T1 MRI (MPRAGE) showing an ill-defined skull lesion in the left frontal bone (thick arrow) with enhancing soft tissue process. A similar smaller lesion (thin arrow) is present in the right frontal bone. A significant decrease of both lesions was seen in the follow-up MRI (B and D) three months after the onset of therapy.
