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Right temporal cortico-subcortical hyperintense lesion with slight mass effect due to decompression sickness

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MRI done 4 days after clinical onset (left, left center, and right center columns) and 5 days after clinical onset (right) column. Axial fluid-attenuated inversion recovery (FLAIR) images (left column) show a right temporal cortico-subcortical hyperintense lesion with slight mass effect (red arrows). Axial diffusion-weighted imaging (DWI) sequences (left center column) did not show a high-signal intensity of lesions, whereas axial apparent diffusion coefficient maps (right center column), show a hyperintense lesion in this location (yellow arrows). (D,H) Axial gadolinium-enhanced 3D T1- weighted (Gd T1WI) images (right column) show the presence of a slight enhancement of irregular morphology (blue arrow). (Source: Sánchez-Villalobos JM, Fortuna-Alcaraz ML, Serrano-Velasco L, et al. Breath-hold diving-related decompression sickness with brain involvement: from neuroimaging to pathophysiology. Tomography 2022;8[3]:1172-83. Creative Commons Attribution License [CC BY], https://creativecommons.org/licenses/by/4.0.)