Fig 4. Patient 4. Axial FLAIR image (A) and diffusion-weighted imaging (DWI) (B) through the temporal lobes obtained on admission show no medial temporal lobe abnormality. Axial FLAIR image (C), DWI (D), and apparent diffusion coefficient (ADC) mapping (E) obtained 5 days later revealed new medial temporal T2 prolongation both on FLAIR and diffusion-weighted images. ADC map demonstrates normal diffusivity.