There is a large area of abnormal high T2/flair signal involving the cortex and white matter of the left temporal, parietal and occipital lobe, including involvement across the splenium of the corpus callosum and into the left thalamus. No region of abnormal contrast enhancement, elevated cerebral blood volume (CBV) or signal dropout on SWI. MR spectroscopy demonstrates reduced NAA and elevated choline, with small lactate peaks centrally.
There is a serpiginous area of increased diffusion restriction across the medial aspect of the left temporal lobe, which probably represents the hippocampal body/tail, possibly secondary to seizure activity.
Conclusion: Large mass involving the left temporal, parietal and occipital lobes without contrast enhancement. Findings are most in keeping with a low-grade infiltrative astrocytoma.