Spinal dural arteriovenous fistula

Mechanism and manifestations

Walking may progressively worsen with weakness, numbness or urinary problems. It can be mistaken for lumbar stenosis; an unusual course requires diagnostic reconsideration.

Diagnosis and management

MRI may suggest the lesion; spinal angiography generally defines the fistula. A specialist team considers surgical closure or embolization. Treatment targets the vascular shunt, which mechanical modalities cannot correct.

Points to consider

These conditions may produce progressive or acute signs and need targeted investigation. Standard MRI does not always provide all required information; specialists select additional tests. New motor deficits, loss of sphincter control or rapid deterioration need immediate assessment.

Role of TAGMED care

With acute symptoms, urgent hospital assessment takes priority. This condition first requires medical diagnosis and, depending on the situation, specialist management. TAGMED services do not replace treatment of infection or tumor, stabilization of an unstable injury, or neurological or vascular treatment. Any conservative support should be considered only after diagnosis, restrictions and the treating team’s recommendations have been clarified.

Related concepts and distinctions

These concepts belong to the same field, but are not synonyms.

• Spinal arteriovenous malformation — Abnormal arteriovenous connections within or around the spinal cord that may cause bleeding, congestion or impaired perfusion.
• Spinal cerebrospinal fluid leak — Escape of cerebrospinal fluid from its usual spinal compartment through a dural defect or certain abnormal communications.
• Spinal arachnoid cyst — Fluid-filled sac associated with the arachnoid in the spinal canal, which may be intradural or extradural and sometimes compress neural structures.

Medical references

1. Johns Hopkins Medicine. Arteriovenous Fistula (AVF).
2. American College of Radiology / RSNA, RadiologyInfo. Spine MRI.

References document the topic; their inclusion does not imply endorsement of TAGMED services by those organizations.