PMC5903160_01
a Sagittal T1 MRI brain prior to neurological deterioration. b Repeat MRI brain following neurological deterioration demonstrating new tonsillar herniation.
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F1
An urgent MRI brain demonstrated evidence of tonsillar herniation and coning which was not present on her previous cranial imaging (Fig. 1).
Axial T2 MRI brain before (a) and after (b) foramen magnum decompression and C1 laminectomy.
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F2
Postoperative MRI demonstrated satisfactory decompression of the foramen magnum (Fig. 2).