Benign tumors of the cerebral dural sinuses

✓ During an anatomical study of 295 cerebral dural sinuses obtained from cadavers, polypoid nodules were found in the superior sagittal sinus in two specimens. In 23 additional specimens, similar but smaller nodules were encountered in the transverse sinuses. The polyps in the superior sagittal sinuses were of sufficient size to cause a dilatation of the sinuses at the level of the masses. The histological evidence indicates their origin to be Pacchionian granulations.