Female, 32 years old, with multiple sclerosis. Comparison is complicated by artifact from dental appliances on both the present and prior examinations. A large T2 hyperintense lesion within the genu of the corpus callosum appears to be new and also appears to produce edema with mild local mass effect. This lesion, and a small lesion at the margin of the right frontal horn, both demonstrate enhancement on postcontrast images. Scattered additional smaller nonenhancing periventricular and corpus callosum T2 hyperintense lesions are seen which do not appear to have changed significantly in the interval. Slight effacement of the right lateral ventricle is seen due to the genu lesion. Otherwise, the ventricular system is within normal limits.
A large lesion within the genu of the corpus callosum appears to be new and is associated with edema and mild local mass effect. This lesion, and a smaller lesion at the margin of the right frontal horn, demonstrate enhancement. Multiple additional smaller nonenhancing lesions do not appear to have changed significantly.