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  Indian J Med Microbiol
 

Figure 4: DSA showing craniovertebral junction perimedullary arteriovenous fistula. Cranially to the perimedullary arteriovenous fistula, there was evidence of venous pseudoaneurysm; the perimedullary arteriovenous fistula had arterial feeders from both hypertrophic anterior spinal arteries, originating from the intracranial portion and from cervical radicular branches – which stemmed at the right C3–C4 and left C2 level, of greater caliber and flow to the left – of both vertebral arteries; the main venous drainage, dilated, was at the level of the basal venous plexus, with drainage in both inferior petrous sinuses and at the level of the left posterior cervical paravertebral plexus, also markedly dilated

Figure 4: DSA showing craniovertebral junction perimedullary arteriovenous fistula. Cranially to the perimedullary arteriovenous fistula, there was evidence of venous pseudoaneurysm; the perimedullary arteriovenous fistula had arterial feeders from both hypertrophic anterior spinal arteries, originating from the intracranial portion and from cervical radicular branches – which stemmed at the right C3–C4 and left C2 level, of greater caliber and flow to the left – of both vertebral arteries; the main venous drainage, dilated, was at the level of the basal venous plexus, with drainage in both inferior petrous sinuses and at the level of the left posterior cervical paravertebral plexus, also markedly dilated