Fig. 5

A 14-year-old boy presented with acute fever, ataxia and dizziness with history of mastoiditis was diagnosed as right cerebellar abscess. A axial pre-contrast FLAIR shows: a well circumscribed right cerebellar hemisphere lesion with central intermediate signal intensity of its content and high signal intensity of the surrounding mild vasogenic edema. B Axial post-contrast FLAIR shows: thicker walled and more bright ring enhancement of the lesion (more marked at its medial aspect) than in post-contrast T1WI (B). Also it is clearly delineated from the background edema. C axial pre-contrast T1WI shows: a well-defined right cerebellar hemisphere lesion with low signal intensity of the internal content. D axial post-contrast T1WI shows thin smooth ring enhancement of the lesion. E axial subtraction FLAIR image. F axial DWI showing restricted content of the right cerebellar lesion