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Examples of various transverse venous sinus anatomy patterns. A, Codominance between the right (solid arrow) and left (dashed arrow) transverse sinuses. B, Right-side-dominant (solid white arrow) transverse sinus compared with the left (dashed white arrow), with an occipital sinus noted (black arrow). C, Left-side-atretic transverse sinus (dashed arrow) with flow through the right (solid white arrow).
