Emission CT for the Diagnosis of Malignant Meningiomas We read with great interest a recent article by Nagar et al in the American Journal of Neuroradiology investigating the usefulness of diffusion-weighted MR imaging in differentiating atypical/malignant meningiomas from benign meningiomas and detecting histologic dedifferentiation to higher tumor grade. The authors studied 48 cases of mening...
