Cavernous nodules in the dural sinuses

Abstract

✓ In x-ray examination of the confluence of the great vein of Galen and the straight sinus in 94 autopsy cases, a polypoid or lip-like contrast defect was observed at the lower border of this confluence in 10 cases. The contrast defect was caused by a structure containing collagen fibers forming a trabecular system, a plexus of sinusoidal channels, and nerve fibers. The defect has also been observed clinically in the venous phase of cerebral angiograms. The possible effect of the structure on the blood flow in the great vein of Galen and the straight sinus is discussed.