Fig. 6

 A-E patient with a type VI tumor was located in the posterior third of the superior sagittal sinus; the tumor filled the venous sinus and invaded the contralateral wall. D and E show the pre-operative MRV: the posterior third of the superior sagittal sinus was utterly occluded, surrounded by many compensated draining veins. F-K complete post-operative resection of the tumor: the tumor was resected together with the venous sinus, and no venous sinus reconstruction was performed. I-K post-operative MRV suggests the disappearance of the posterior third of the superior sagittal sinus, with surrounding compensatory vessels still present