PMC4891617_01
Radiation necrosis masquerading as late tumor recurrence. Five years after treatment for malignant ependymoma, axial FLAIR MRI image showed stable post-treatment changes and no residual or recurrent tumor. [Powerpoint Slide]
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There was a small area with minimal high signal on FLAIR sequences with slight vasogenic edema on T2 weighted images and minimal post-contrast enhancement located adjacent to the surgical tract (Figure 1A, Figure 1B, Figure 1C); this area was thought to be consistent with a cortical venous structure, though tumor recurrence was not entirely excluded.
Radiation necrosis masquerading as late tumor recurrence. Five years after treatment for malignant ependymoma, axial FLAIR T2-weighted MRI image showed stable post-treatment changes and no residual or recurrent tumor. [Powerpoint Slide]
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T2 weighted images and mass effect on the posterior aspect of the left lateral ventricle with minimal midline shift (Figure 2A, Figure 2B, Figure 2C, Figure 2D).