Clinical question: Cerebral edema. Signs and symptoms: Asterixis, head CT of cerebral edema. Nonenhanced brain MRI:Negative diffusion weighted series.Very subtle FLAIR hyperintensity of bilateral hemispheric white matter likely representing patient's known mild cerebral edema. The cortical sulci, ventricular system and all the CSF spaces remain widely patent and with maintained. The cerebral cortex demonstrate normal signal intensity and without convincing evidence of edema. There is no evidence of hemorrhage.The signal void of major intracranial arterial branches are identified. The signal intensity of the intracranial venous sinuses are within normal.Unremarkable calvarium, soft tissues of the scalp, orbits and paranasal sinuses. Mild opacification of bilateral mastoid air cells and with normal signal intensity of the middle ear cavities.
1.Negative diffusion-weighted series.2.Suspected mild bilateral hemispheric white matter FLAIR hyperintensity which could represent subtle underlying edema.3.Unremarkable exam otherwise as detailed above.