Скачать или смотреть Case Report- Developmental Venous Anomaly (DVA)/CT BRAIN 🧠/ Radiology 2.0.......

Developmental Venous Anomaly; DVA, also called venous "angioma" or "venous malformation," is an umbrella-shaped congenital cerebral vascular malformation composed of angiogenically mature venous elements.

Persistence of primitive medullary veins with recruitment of transparenchymal anastomotic drainage pathways eventually matures into a classic DVA.

Approximately 70% of DVAs are found in the deep white matter, adjacent to the frontal horn of the lateral ventricle.
The second most common location is next to the fourth ventricle (15-30%).

General Features. DVAs are composed of radially arranged medullary veins that converge on a transcortical or subependymal large collector vein. The classic appearance is that of a "Medusa head" or upside-down umbrella.
CT Findings
NECT scans are usually normal unless the DVA is very large and a prominent draining vein is present. Unilateral basal ganglia calcification has been reported in the drainage territory of some deep DVAs.
CECT scans show numerous linear and/or punctate enhancing foci that converge on a well-delineated tubular collector vein .

MR Findings-
• T2/FLAIR-Collector vein = flow void on T2WI .Radicles of "Medusa head" hyperintense on FLAIR.
• T2* (GRE/SWI)-Linear hypointensities in radicles, collector vein.Blooming foci if mixed with CCM
• T1 C+- "Umbrella" of tubular radicles → collector vein
DSA -Classic "Medusa head" in venous phase
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