Fig. 1
From: An easily overlooked disease in the early stages: acute intermittent porphyria

The brain MRI conducted on February 28, 2024, revealed asymmetrical, scattered patchy abnormal signals in the bilateral parieto-occipital cortical areas and cerebellar hemispheres. These signals were hypointense on axial T1-weighted MRI and hyperintense on axial T2-weighted and fluid-attenuated inversion recovery (FLAIR) MRI sequences. The diffusion-weighted images (DWI) localized high signal intensity