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Initial head CT demonstrating the presence of the retroclival hematoma. CT, computed tomography.
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Subarachnoid hemorrhage in the prepontine cistern was found along with bleeding around the foramen magnum (Fig. 1), with no cervical bony or ligamentous injury.
T2-weighted MRI showing a retroclival hematoma (A), stripping of the tectorial membrane (B), and prevertebral hemorrhage (C). MRI, magnetic resonance imaging.
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The MRI showed craniocervical distraction with retroclival hemorrhage (Fig. 2).
Head CT on hospital day 4 showing the presence of hydrocephalus. CT, computed tomography.
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Repeat CT of the head showed persistent hydrocephalus, a stable third ventricle but increased dilatation of the lateral ventricles and lateral horns (Fig. 3).
Three month poststabilization cervical spine radiograph.
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Subsequent visits at 3 and 6 months were unremarkable (Fig. 4), and he made a full recovery from his atlanto-occipital injuries.