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Patient with recurrence of a high grade tumor (WHO Grade 4 glioma) after prior treatments. A: Sagittal T1 contrast MRI demonstrates tumor enhancement adjacent to the anterior (open arrow) and posterior (closed arrow) margins of a resection cavity. B: 124I-CLR1404 sagittal PET demonstrates concordant uptake in the anterior enhancing tumor but no uptake in the posterior enhancing tumor. C: Fused PET/MRI image.
