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Sigmoid sinus diverticulum and pulsatile tinnitus: analysis of CT scans from 15 cases.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Liu, Zhaohui Chen, Chengfang Wang, Zhenchang Gong, Shusheng Xian, Junfang Wang, Yongzhe Liang, Xihong Ma, Xiaobo Li, Yi
Description	Author Affiliation: Liu Z ( Department of Radiology.)
Abstract	BACKGROUND: Although the imaging features of sigmoid sinus diverticulum induced pulsatile tinnitus (PT) have been presented in some extent, detailed imaging findings still have not been systematically evaluated and precise diagnostic radiographic criteria has not been established. PURPOSE: To examine the computed tomography (CT) characteristics of sigmoid sinus diverticulum accompanied with PT. MATERIAL AND METHODS: Fifteen PT patients with sigmoid sinus diverticula proven by surgery were recruited after consenting. CT images of 15 patients were obtained and analyzed, including features of diverticula, brain venous systems, integrity of the sigmoid plate, and the degree of temporal bone pneumatization. RESULTS: Sigmoid sinus diverticulum was located on the same side of PT in 15 patients. Diverticula originated at the superior curve of the sigmoid sinus in 11 patients and the descending segment of the sigmoid sinus in four patients. Sigmoid sinus diverticula focally eroded into the adjacent mastoid air cells in 12 patients and mastoid cortex in three patients. Among eight patients with unilateral dominant brain venous systems, the diverticula were seen on the dominant side in seven patients and non-dominant side in one patient. In contrast, the other seven patients showed co-dominant brain venous systems, with three presenting diverticula on the right side and four on the left. More notably, dehiscent sigmoid plate on the PT side was demonstrated in all patients. In addition, temporal bone hyper-pneumatization was found in nine patients, good and moderate pneumatization in three patients, respectively. CONCLUSION: Dehiscent sigmoid plate and extensive temporal bone pneumatization are two important imaging characteristics of the PT induced by sigmoid sinus diverticulum.
File Format	HTM / HTML
ISSN	02841851
Issue Number	7
Volume Number	54
e-ISSN	16000455
Journal	Acta Radiologica
Language	English
Publisher	Sage Publications
Publisher Date	2013-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Radiology Cranial Sinuses Diverticulum Tinnitus Tomography, X-ray Computed Methods Adult Algorithms Contrast Media Female Humans Iopamidol Male Middle Aged Radiographic Image Interpretation, Computer-assisted Retrospective Studies Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology

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