Dural Arteriovenous Fistula Mimicking a Supratentorial Tumor.
BACKGROUND
The pathophysiology of dural arteriovenous fistulas (dAVF) is not fully understood. Retrograde venous flow can lead to venous congestion and disruption of the blood-brain barrier, resulting in diffuse contrast enhancement.


CASE DESCRIPTION
We present the case of a patient with a supratentorial dAVF associated with a solid, tumor-appearing, corticosubcortical contrast-enhancing lesion. Surgical occlusion of the dAVF was followed by complete regression of the contrast-enhancing lesion. Histologic analysis of the lesion showed normal brain tissue.


CONCLUSIONS
This case report highlights how venous congestion is an important differential diagnosis in contrast-enhancing lesions associated with dAVF and how it should be taken in consideration to avoid radiologic misdiagnoses and unnecessary treatment.
['Goldberg|Johannes|J|', 'Beck|Jürgen|J|', 'Bervini|David|D|']
D001812:Blood-Brain Barrier D001921:Brain D020785:Central Nervous System Vascular Malformations D017023:Coronary Angiography D005260:Female D005682:Gadolinium D006801:Humans D008279:Magnetic Resonance Imaging D008875:Middle Aged D015173:Supratentorial Neoplasms
Dural arteriovenous fistula Arteriovenous fistula Venous congestion Contrast enhancement Brain