Departments of Radiology,Jeju National University College of Medicine, Jeju, Korea.
AJNR Am J Neuroradiol. 2011 Aug;32(7):1178-81. doi: 10.3174/ajnr.A2476. Epub 2011 Jul 14.
Only 1 ultrasonography study that described the variation of the VN had been published at the time our research was begun. The purpose of this study was to evaluate the incidence and type of variation in the course of the cervical VN on thyroid ultrasonography.
From August 2009 to September 2010, 163 consecutive patients were evaluated by sonography for the screening and characterization of thyroid nodules (mean age, 49.0 ± 14.4 years, male:female, 20:143). Two types of variation were defined as follows: 1) anterior variation, when the course of the VNs changed from the typical location to an anterior location in front of the CCA; and 2) medial variation, when the course of the VNs changed from the typical location to a location medial to the CCA (between CCA and thyroid gland). The incidence of the each variation was studied.
Variation in the course of the VN occurred in 5.5% (18/326) of cases. The anterior variation was observed in 4.3% (14/326, right:left = 4:10), and the medial variation was observed in 1.2% (4/326, right:left = 3:1). For both variations, the VN was close to or nearly abutted the thyroid gland after it changed course.
Variation in the course of the cervical VN could be assessed by ultrasonography. Two variations were observed in 5.5% of cases. The anterior variation was more common than the medial variation.
在我们开始研究时，仅有 1 项描述 VN 变异的超声研究已发表。本研究旨在评估甲状腺超声检查中颈内静脉（VN）行程变异的发生率和类型。
2009 年 8 月至 2010 年 9 月，对 163 例连续患者进行超声检查，以筛查和描述甲状腺结节（平均年龄 49.0±14.4 岁，男：女=20：143）。将以下两种变异定义为：1）前变异，当 VN 的行程从典型位置改变为 CCA 前方的前位置；2）内侧变异，当 VN 的行程从典型位置改变为 CCA 与甲状腺之间的内侧位置（CCA 和甲状腺之间）。研究了每种变异的发生率。
VN 行程的变异发生在 5.5%（18/326）的病例中。前变异占 4.3%（14/326，右：左=4：10），内侧变异占 1.2%（4/326，右：左=3：1）。对于这两种变异，VN 在改变行程后靠近或几乎紧贴甲状腺。
超声可以评估颈内静脉（VN）行程的变异。两种变异在 5.5%的病例中观察到。前变异比内侧变异更常见。
