Neuroradiology
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We reviewed the MRI of seven patients with syringomyelia associated with surgically proven adhesive spinal arachnoiditis to describe clinical and MRI findings in this condition. Using 0.5, 1.0 or 1.5 tesla units, we obtained sagittal T1- and T2-weighted spin-echo and axial T1-weighted images. Additional sagittal T2-weighted images were obtained without using motion-artefact suppression. ⋯ Focal blurring of the syrinx wall on axial images was seen in six patients. Flow voids were seen in the syrinx fluid in all cases on T2-weighted images obtained without motion-artefact suppression. No abnormal contrast enhancement was demonstrated.
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Cavernous malformations are usually intraparenchymal, extra-axial lesions being uncommon. They have very rarely been reported as the cause of subarachnoid hemorrhage. ⋯ First, it is rare for an intracranial cavernous malformation to present with massive subarachnoid hemorrhage. Secondly, this cavernous malformation lay in the chiasmatic cistern.