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Prevalence of incidental narrowing of the superior segment of the internal jugular vein in patients without multiple sclerosis.

Abstract：

PURPOSE:Internal jugular vein (IJV) narrowing superiorly is likely relatively frequent. IJV narrowing has been proposed as a potential pathophysiologic component for multiple sclerosis (MS). Our purpose was to investigate the prevalence of incidental superior IJV narrowing in patients imaged with neck computed tomography angiography (CTA) for reasons unrelated to IJV pathology or MS. METHODS:We retrospectively identified 164 consecutive adult patients who had undergone neck CTA in which at least one IJV superior segment was opacified (158 right, 155 left IJVs). At the narrowest point of the upper IJV, each IJV was assessed for dominance, graded (shape and narrowing), measured (diameter and area), and located (axially and craniocaudally). Associations were analyzed using Spearman rank correlations (p < 0.05 significant). Medical records were reviewed for MS. RESULTS:Among 164 patients, at least one IJV was: absent/pinpoint in 15 % (25/164), occluded/nearly occluded in 26 % (43/164). Shape, narrowing, and the three measurements all correlated with each other (all p < 0.01). Lateral location with respect to C1 transverse foramen correlated with subjectively and objectively smaller IJVs (p < 0.01). The most common craniocaudal location was at the C1 transverse process (79 % (125/158) of right and 81 % (126/155) of left IJVs). No patient had a diagnosis of MS. CONCLUSIONS:The appearance of the superior IJV is variable, with an occlusive/near-occlusive appearance present in approximately one-quarter of patients without known MS undergoing CTA. Radiologists should be aware of and cautious to report or ascribe clinical significance to this frequent anatomic variant.

journal_name

Clin Neuroradiol

journal_title

Clinical neuroradiology

authors

Diehn FE,Schwartz KM,Hunt CH,Eckel LJ,Campeau NG,Carter RE,Allred JB,Kallmes DF

doi

10.1007/s00062-013-0232-z

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

121-7

issue

2

eissn

1869-1439

issn

1869-1447

journal_volume

24

pub_type

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