case_images: PMC7737546_01
case_images: (A and B) Enhanced angiographic CT examination in and (C and D) maximum intensity projection technique showed a complex tangle of dilated and tortuous vessels of the right-sided temporoparietooccipital regions and posterior condylar area (arrowheads).
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case_images: Cross-sectional magnetic resonance imaging revealed a serpentine T2 signal void situated in the right parieto-occipital and anterior temporal regions (Figures 1 and 2).
case_images: (A) Axial T2 weighted image demonstrates fine tortious dural vessels at the right parietooccipital and temporal region (arrowheads). (B and C) Susceptibly weighted image (SWI) showed engorged dural vessels with multifocal intraparenchymal hemorrhage in the right temporal and occipital area (arrows). (D) Arterial spin labeling (ASL) showed an increased blood pool in the right occipital and temporal region, resembling venous congestion.
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case_images: Cross-sectional magnetic resonance imaging revealed a serpentine T2 signal void situated in the right parieto-occipital and anterior temporal regions (Figures 1 and 2). Arterial spin labeling imaging demonstrated excessive blood pooling in the affected area, resembling venous congestion (Figure 2).
case_images: (A) Lateral cerebral angiogram selectively through the left external carotid artery (arrowhead) showed Torcula dAVF (asterisk) and posterior condylar vein (arrow). (B and C) Cerebral angiogram lateral view and 3D reconstruction of the right external carotid artery injection respectively showed posterior condylar vein (arrow), lateral sinus dAVF (asterisk) and the left external carotid artery (arrowhead). (D) AP view cerebral angiogram through the left external carotid artery showed Torcula dAVF (arrowhead). (E) Three dimensional both ECA angiogram (fused image) visualizes Torcula dAVF, and lateral sinus dAVF (arrowheads).
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case_images: The diagnostic cerebral angiogram revealed a dAVF at the posterior condylar confluence (PCC), supplied by the proximal branches of the occipital artery and ascending pharyngeal artery (Figure 3). Moreover, filling of the posterior superior sagittal sinus or right lateral sinus was not identified on the right internal carotid angiogram (Figure 3).
case_images: (A) The selective roadmap of the lower skull part shows super-selection of paravertebral venous plexus reaching to posterior condylar vein dAVF (arrow). (B) Platinum coils were deployed at the posterior condylar vein dAVF (arrows). (C) The final run shows the total obscuring of posterior condylar vein AVF (asterisk). (D and E) Post-operative computed tomography images reveal complete coil material at the location of posterior Condylar vein dAVF, with embolic material obscuring the lateral sinus Davf (arrowheads).
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case_images: Complete occlusion was accomplished following the deployment of ORBIT GALAXY coils (Codman Neurovascular, Raynham, MA, USA) and HydroSoft coils (MicroVention Terumo, Tustin, CA, USA; Figure 4).