Bone remodeling in sigmoid sinus diverticulum after stenting for transverse sinus stenosis in pulsatile tinnitus: A case report

Figure 1 Dynamic changes of the sigmoid sinus wall on computed tomography venography. A: Preoperative image; B: Image on the second day after surgery; C: Compared to A and B, a decrease in the sigmoid sinus diverticulum (orange arrow) with new bone remodeling (orange arrowhead) was observed on the image obtained 6 mo after surgery; D: The density of the remodeled bone was increased on the image obtained one year after surgery; E: The formation of a hardened remodeled edge was observed on the image obtained 2 years after surgery. Sigmoid sinus wall dehiscence (white arrow) revealed no changes on the computed tomography images obtained at various time points.

Figure 2 Dynamic changes of the transverse sinus and stent on computed tomography venography. A: Severe transverse sinus stenosis was observed on the left side on pre-operative computed tomography, which may be formed by arachnoid granulations; B-C: The transverse sinus stenosis was well expanded by the stent; D: A slight filling defect in the stent was observed on the image obtained 1 year after surgery; E: The filling defect was enlarged after another year.

Figure 3 Three-dimensional reconstruction of the pre-operative computed tomography images. Left-sided outflow dominance, left sigmoid sinus diverticulum (orange arrowhead), and bilateral localized TSS (orange arrow) were observed.