Figure 3

The first row (A–D) shows preoperative T1w contrast images (A), postoperative DWI (B) and T1w contrast images at date of tumor recurrence (C,D)). In the postoperative DWI only rim-like DWI-hyperintensity without territorial ischemia was present, in this case a local unifocal recurrence pattern (C), but not multifocal recurrence with contact to ventricle (D) was observed. The second row (E–H) shows pre- (E), postoperative (F) and follow-up (G,H) images of another patient. (F) shows a larger DWI-hyperintensity in the territory of the anterior cerebral artery. In this case a multifocal tumor recurrence with contact to the ventricle was observed.