Reason: Brain tumor History: Confusion. There is a large enhancing lesion centered in the splenium of the corpus callosum measuring up to 4.5 x 4.9 cm. The lesion extends into the left occipital and medial temporal lobes with significant associated edema in the left parietal, bilateral occipital and medial left temporal lobes. Non enhancing T2 hyperintensity spreads to involve the left hippocampal formation. There is local mass effect with effacement of the left occipital horn. T2 hyperintensity in the right cerebellum may represent age-indeterminate ischemia. Additional T2 hyperintensity in the left insula is nonspecific. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
Large enhancing lesion in the splenium of the corpus callosum and left temporal and occipital lobes with associated edema and mass effect.