Bilateral water sign: a new imaging sign for evaluating neurovascular compression in primary trigeminal neuralgia
10.3760/cma.j.cn115354-20200814-00644
- VernacularTitle:双水征：一种用于评估原发性三叉神经痛神经血管压迫的新影像学征象
- Author:
Shenjie LI
1
;
Hao SUN
;
Dan XU
;
Ke WANG
;
Jie ZHOU
;
Yang MING
;
Xiaofei LU
;
Hong XIAO
;
Ligang CHEN
Author Information
1. 西南医科大学附属医院神经外科 四川省神经外科临床医学研究中心，泸州 646000
- Keywords:
Bilateral water sign;
Neurovascular compression;
Trigeminal neuralgia
- From:
Chinese Journal of Neuromedicine
2020;19(11):1094-1097
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate a new imaging sign, named" bilateral water sign" (BWS), which can evaluate the neurovascular compression of primary trigeminal neuralgia (TN).Methods:A prospective study was conducted on 85 primary TN patients admitted to our hospital from March 2017 to March 2019. All patients accepted magnetic resonance 3D-T2W-DRIVEN sequence examination and multiplanar reconstruction (MPR) for post-processing. The sequential nerve (low signal)-cerebrospinal fluid (high signal)-vessel (low signal)-cerebrospinal fluid (high signal)-nerve (low signal) signs on the recombination plane were named as "BWS". The sensitivity, specificity, positive predictive value and negative predictive value of BWS in evaluating the neurovascular compression were calculated respectively, by combining with intraoperative situation of microvascular decompression (MVD).Results:In 85 TN patients, 46 patients (54.12%) had BWS. The sensitivity was 57.14%, the specificity was 75.00%, the positive predictive value was 95.65% and the negative predictive value was 15.38%. There was a statistically significant difference in the degree of neurovascular compression between patients with and without BWS ( P<0.05); and degree of neurovascular compression was severer in patients with BWS. Conclusion:BWS can evaluate the relation of neurovascular compression in TN patients and suggest the degree of neurovascular compression.
