A high T2 signal mass in the posterior part of the left superior frontal gyrus, abutting and involving the precentral gyrus has low T1 signal and partial FLAIR suppression and peripheral restricted diffusion. No enhancement or increased perfusion. Spectroscopy demonstrates elevated choline and reduced NAA. No abnormal meningeal enhancement identified. The dural venous sinuses are patent.
Conclusion: The overall appearances of the medial posterior left frontal lobe mass would most favour a low-grade astrocytoma (previously classified as a protoplasmic astrocytoma).