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Fig. 1 | BMC Neurology

Fig. 1

From: Neurological manifestations of polyarteritis nodosa: a tour of the neuroaxis by case series

Fig. 1

Case 2. a Axial non-contrast CT image at the level of the foramen magnum shows diffuse subarachnoid hemorrhage (solid arrows). b Sagittal T2W MRI image of the spine shows intradural hemorrhage in the upper thoracic spine (dashed oval) compressing and posteriorly displacing the adjacent thoracic cord. c-e Intraoperative images of fusiform thoracic spinal artery aneurysm resection. d A large fusiform aneurysm was identified (arrow) and isolated with 2 clips placed on either side along the parent vessel. e The fusiform aneurysm and small segment of posterior spinal artery was resected (arrow) using microsurgical technique and separated from the arachnoid of the cord. f Low power magnification view of the biopsy from the posterior spinal artery branch showing disruption of the vessel wall (original X40). g High power view of the vessel wall with lymphocytic infiltration and destruction of vessel wall, consistent with vasculitis (original × 100). h Elastic Van-Gieson stain demonstrating presence of elastic lamina in the lower half of the vessel wall (black arrows) and its destruction on the upper half of the vessel wall (red arrows, original × 100)

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