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Figure 2. Lateral MIP image from contrast-enhanced MR venography, with editing of the deep veins to improve the visibility of the ascending veins that drain into the superior sagittal sinus from the lateral hemispheric cortex (the frontopolar [1], anterior frontal [2], and posterior frontal [3] veins; Trolard vein [superior anastomotic vein] [4]; and anterior parietal veins [5]) and the larger named veins on the lateral surface of the cerebrum (the superficial sylvian vein [superficial middle cerebral vein] [6], which typically drains into the sphenoparietal sinus or the cavernous sinus, and the Labbé vein [7], which drains into the transverse sinus). The relative luminal diameters of the Trolard vein, Labbé vein, and superficial sylvian veins are reciprocal.
