“Snake Fang” Sign without Carotid Stenosis on Duplex Ultrasonography Indicates High Risk of Artery‐to‐Artery Embolic Stroke

Tateishi, Yohei; Tsujino, Akira; Hamabe, Jumpei; Tasaki, Osamu; Morikawa, Minoru; Hayashi, Tomayoshi; Horie, Nobutaka; Hayashi, Kentarō; Suyama, Kazuhiko; Nagata, Izumi

doi:10.1111/j.1552-6569.2012.00764.x

Cited by 5 publications

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References 13 publications

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“…Vassileva et al reported a few cases of free-floating thrombus of the nonstenotic carotid artery detected by colour duplex sonography in ischemic stroke patients [ 8 ]. Tatheishi et al described the “snake fang sign”, characterized by a protruding carotid plaque which was associated with free floating thrombus and ischemic stroke [ 14 ]. Our findings emphasize the advantages of a detailed sonographic examination of the peripheral arteries in cases of arterial embolism.…”

Section: Discussionmentioning

confidence: 99%

The Flashlight-Sign: A Novel B-Flow Based Ultrasound Finding for Detection of Intraluminal, Wall-Adherent, Floating Structures of the Abdominal Aorta and Peripheral Arteries

et al. 2022

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This study aimed to evaluate the potential diagnostic value of a novel, sonographic, B-Flow (BFl)-based sign (“flashlight sign”, FLS) for the detection of wall-adherent, floating arterial structures (WAFAS). The FLS, characterized by a fast moving, very bright, intraluminal signal, was detected in 28 patients with WAFAS. We divided this cohort into three subgroups according to the affected vascular segments: (1) peripheral arteries (n = 10); (2) native abdominal aorta (n = 8); and (3) abdominal aorta after endovascular aortic repair (EVAR; n = 10). Clinical characteristics were analyzed and BFl-findings were compared with contrast-enhanced ultrasound (CEUS) and computed tomography angiography (CTA). Seven patients (25%) suffered from arterial embolism downstream to the FLS (EVAR, n = 4; native abdominal aorta, n = 1; peripheral arteries, n = 2). WAFAS of the abdominal aorta (native or after EVAR), as indicated by the FLS, were visible by CEUS and CTA in 60% and 93.3%, respectively. Based on the largest cohort (to this point) of patients with WAFAS, we propose a clinically useful, BFl-based sonographic sign for the detection of these underrated arterial pathologies in the abdominal aorta and the peripheral arteries.

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Section: Discussionmentioning

confidence: 99%