Fig. 2

a, b Noncontrast head CT axial (a) and sagittal (b) images two days postoperatively showing hypodensities in a ‘top of the basilar’ injury distribution, affecting the thalami (A, arrowhead), right PCA territory (A, arrow) and midbrain (B, arrow). c, d Axial FLAIR MRI sequences ten days postoperatively showing evolution of the ischemic injuries to the thalami (C, arrowhead), right PCA territory (C, arrow), and midbrain (D, arrow). Herniation of the brain through the craniectomy defect (C and D, asterisks) and downward through the foramen magnum (E, arrow) suggests intracranial hypertension. f, g Axial diffusion-weighted sequence (f) and corresponding apparent diffusion coefficient map (g) show diffuse acute supratentorial deep white matter cytotoxic edema