Developmental venous anomaly
h/o recurrent seizures
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The FLAIR images are apparently normal.
post contrast images show enhancing cortical venous tributaries in left parietal cortex converging into a large draining vein (yellow arrows) that further drains into a subependymal vein.
no evidence of ischemia or edema seen.
2 case question available
Developmental venous anomalies(DVA) aka venous angioma represent variations of normal venous drainage rather than true malformations.
consist of tortuous tributary veins that converge on an enlarged draining vein giving a "caput medusae" appearance.
- Clinical MR Imaging: A Practical Approach edited by Peter Reimer, Paul M. Parizel, James F. M. Meaney, Falko A. Stichnoth