What are the findings of MR spectroscopy of meningioma?
Increase in alanine (1.3-1.5 ppm) Increased glutamine/glutamate Increased choline (Cho): cellular tumor Absent or significantly reduced N-acetylaspartate (NAA): non-neuronal origin Absent or significantly reduced creatine (Cr)
A craniotomy was done and an excision of the lesion.
After one year, a brain MRI with contrast was done for follow-up and showed:
Evidence of left parietal craniotomy with post-surgical changes and some old blood products.
There is lobulated, well-defined left parafalcine dural-based frontoparietal extra-axial mass, which appears isointense to grey matter on T1, hyperintense on T2/FLAIR, and mild diffusion restriction measuring about 5.5 x 2.4 x 2 cm in the AP, TS, and CC dimensions, respectively.
The lesion shows heterogenous enhancement with dural tail enhancement on postcontrast images.
There is a significant decrease in the size of the known left parietal meningioma and its mass effect.
Significant interval improvement regarding the mass effect with no midline shift in comparison to the previous study one year ago.