Figure 8.
Pseudoresponse following bevacizumab therapy in a 15 year old male patient with recurrent high grade glioma with histone H3.3 G34 mutation in the left temporal lobe. Extensive heterogenous enhancement (A, post-contrast T1-weighted image) and edema with mass effects (D, FLAIR image) have been significantly reduced 3 weeks after the start of bevacizumab therapy (B, E, post-contrast T1-weighted image and FLAIR image, respectively); however, there is evidence of worsening of enhancement (C, motion degraded post-contrast T1-weighted image) and infiltrative tumor component (F, FLAIR image), on a follow-up MRI obtained 8 weeks after the start of bevacizumab therapy.