“…[24][25][26] IJV stenosis due to extrinsic compression is not an established cause of PT; however, it is included in the list of potential causes of PT on two grounds: 1) IJV stenosis is an established cause of PT and 2) IJV stenosis due to extrinsic compression is known to cause benign intracranial hypertension, a known association of PT. 21,22 All our patients were scanned in head-neutral position, therefore, it was also not possible to assess the effect of neck rotation on the extrinsically compressed IJV. It is also known that CT A/V or MRA/V is not as sensitive as DSA in detecting dural arteriovenous fistula 14,17 ; therefore, patients with objective PT in particular should be investigated with DSA.…”