Male, 66 years old, with worsening mental status in the setting of hyponatremia correction. Diffusion-weighted images are unremarkable. No significant parenchymal edema or mass effect is detected.Patchy periventricular T2 hyperintensity is seen along with chronic basal ganglia and pontine lacunar infarcts.No intracranial hemorrhage or any abnormal extra-axial fluid collection is detected. The frontal horns of the lateral ventricles are mildly prominent likely reflecting ex vacuo dilatation. Otherwise the ventricular system is within normal limits.A large left frontal scalp lipoma is seen. Marrow signal characteristics are unremarkable.
1. No evidence of acute ischemia or any other definite acute intracranial abnormality.2. No findings to suggest osmotic demyelination or any other process which would account for the patient's worsening mental status.