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Extensive signal change (low T1/high T2) without enhancement is seen extending from the left temporal lobe, back towards the parietal and occipital lobe and then across the splenium of the corpus callosum into the right hemisphere. No diffusion restriction or increased perfusion. Spectroscopy traces within demonstrate elevated choline to creatine ratio, depressed NAA and elevated myoinositol.
Conclusion: low-grade glioma with gliomatosis cerebri growth pattern.