Journal
NEURORADIOLOGY
Volume 44, Issue 3, Pages 216-222Publisher
SPRINGER-VERLAG
DOI: 10.1007/s002340100703
Keywords
brain tumor; magnetic resonance imaging; magnetic resonance spectroscopy; positron emission tomography; radionecrosis
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We report on a young woman who was treated by stereotactic radiotherapy for recurrence of an initially resected low-grade astrocytoma. MRI follow-up examination 7 months after radiotherapy showed a gadolinium-DTPA-enhancing mass lesion indicative of high-grade tumor progression. This assumption was also supported by positron emission tomography with [2-F-18]fluoro-2-deoxy-D-glucose (FDG-PET). In contrast, proton MR spectroscopy (H-1-MRS) indicated radiation necrosis, which was confirmed histopathologically in surgical specimens. Subsequent follow-up examinations up to 19 months after surgery showed no evidence of tumor recurrence.
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