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Lateral View: Comparison of Drainage Pattern Along the Sylvian Fissure on the Right Side and Left Side

Surgical Correlation

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A, Right lateral view. There is no significant superficial sylvian vein. The veins draining the frontal and parietal areas are relatively evenly dispersed over the frontal and parietal lobes and drain predominantly into the superior sagittal sinus. There are two, or duplicate, veins of nearly equal size that cross from the sylvian fissure to the transverse sinus and fit the description of a vein of Labbé. Central and posterior frontal veins of approximately the same size connect the sylvian fissure and superior sagittal sinus, and together constitute a duplicate vein of Trolard. The lower part of the central vein passes along the central sulcus. B, Enlarged view of sylvian fissure. Duplicate veins of Labbé and Trolard drain much of the area along the sylvian fissure. C, Left side. There is a large superficial sylvian vein that has minimal connections with the superior sagittal sinus; however, a significant part of the drainage from this area is directed through a vein of Labbé that crosses the midtemporal area. D, The sylvian fissure has been opened below the superficial sylvian vein that empties anteriorly into the sphenoparietal sinus coursing below the sphenoid ridge and posteriorly into a large vein of Labbé. (Images courtesy of AL Rhoton, Jr.)

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