The SSWAs are seen because of bony contour abnormalities, and contrast offers confirmatory value in diverticulum but is not imperative. SSWAs are much more frequently seen on CT temporal bones among patients with PT compared to the general population [26]. SSWAs are a known cause of vascular PT, and 4% to 32% of PT patients may have it, and they can be successfully treated by wall reconstruction or endovascular stenting [51-55]. Some studies have shown that the degree of transverse sinus stenosis seen on CTV correlates well with transstenotic pressure gradient measured on catheter manometry [26,43,56]. Transverse sinus stenosis could be a cause or result Tinnitus of IIH or SSWA [26,56]. Approximately 60% of the patients of IIH experience tinnitus. Stent placement in transverse sinus stenosis for disabling cases of PT can be curative [57]. Abrupt change in the luminal caliber of the transverse sinus is proposed as a possible etiology for PT and can be seen on CTV of the head. Unilateral dominant size of the venous system is a normal variant in the general population but is equivocal as a causal factor for PT [45]. Venous causes of PT are more frequent than arterial causes [11]. CTV cannot detect arterial abnormalities, whereas a CTA/CTV can detect both arterial and venous abnormalities. MRA Head With IV Contrast MRA head with IV contrast can diagnose dAVF, AVM, and larger glomus jugulare tumors, which can cause PT. A study on 54 patients with PT found excellent accuracy of combined MRA and MRI head without and with IV contrast to detect various pathologies causing PT such as dAVF, AVM, and paragangliomas [58]. IV contrast improves the sensitivity to detect dAVF, AVM, and vascular tumors like glomus jugulare. Time-resolved gadolinium-enhanced MRA is a useful technique in showing vessels with high temporal and spatial resolution to detect dAVFs. It is a reliable technique in the screening and surveillance of DAVF [16,18].
Tinnitus. The SSWAs are seen because of bony contour abnormalities, and contrast offers confirmatory value in diverticulum but is not imperative. SSWAs are much more frequently seen on CT temporal bones among patients with PT compared to the general population [26]. SSWAs are a known cause of vascular PT, and 4% to 32% of PT patients may have it, and they can be successfully treated by wall reconstruction or endovascular stenting [51-55]. Some studies have shown that the degree of transverse sinus stenosis seen on CTV correlates well with transstenotic pressure gradient measured on catheter manometry [26,43,56]. Transverse sinus stenosis could be a cause or result Tinnitus of IIH or SSWA [26,56]. Approximately 60% of the patients of IIH experience tinnitus. Stent placement in transverse sinus stenosis for disabling cases of PT can be curative [57]. Abrupt change in the luminal caliber of the transverse sinus is proposed as a possible etiology for PT and can be seen on CTV of the head. Unilateral dominant size of the venous system is a normal variant in the general population but is equivocal as a causal factor for PT [45]. Venous causes of PT are more frequent than arterial causes [11]. CTV cannot detect arterial abnormalities, whereas a CTA/CTV can detect both arterial and venous abnormalities. MRA Head With IV Contrast MRA head with IV contrast can diagnose dAVF, AVM, and larger glomus jugulare tumors, which can cause PT. A study on 54 patients with PT found excellent accuracy of combined MRA and MRI head without and with IV contrast to detect various pathologies causing PT such as dAVF, AVM, and paragangliomas [58]. IV contrast improves the sensitivity to detect dAVF, AVM, and vascular tumors like glomus jugulare. Time-resolved gadolinium-enhanced MRA is a useful technique in showing vessels with high temporal and spatial resolution to detect dAVFs. It is a reliable technique in the screening and surveillance of DAVF [16,18].