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.
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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