Figure 2

Brain MRI, PET-CT, and MRS findings at 4 months after coiling. 2-deoxy-2-[F-18]fluoro-D-glucose (FDG) and ¹¹C-methionine (MET) PET studies showed that glucose uptake in the lesion with hyperintense areas by FLAIR image (A-D, arrowheads) and enhanced areas by gadolinium-enhanced MRI (E-H, arrowheads) increased slightly or remained at the baseline level (I-L, arrowheads), whereas methionine uptake increased (M-P, arrowheads). ¹H-MRS showed a slight increase of the choline (cho) peak and a marked decrease of the N-acetylaspartate (NAA) peak with an elevated lactate peak in the lesion (Q-S).