Graham J P, Newell S M, Voges A K, Roberts G D, Harrison J M
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610, USA.
Vet Radiol Ultrasound. 1998 Jul-Aug;39(4):297-302. doi: 10.1111/j.1740-8261.1998.tb01609.x.
In humans the dural tail is a sign seen on contrast enhanced T1 weighted magnetic resonance images. This finding is considered specific for meningioma. The purpose of this study was to determine how often the dural tail occurs in cats and dogs and whether it is a specific sign for meningiomas in these species. MR examinations for eighteen dogs and four cats with proven diagnoses were reviewed. Diagnoses included ten meningiomas (seven dogs and three cats), three gliomas, two pituitary tumors, single examples of two other tumor types and five patients with mass lesions due to inflammatory disease. Contrast enhanced T1 weighted images were evaluated independently by three of the authors for the presence of a dural tail, without knowledge of the diagnoses. The results were compared to the diagnosis for each patient and the performance of individual reviewers compared. When their results were averaged, the reviewers reported the presence of a dural tail in 6 of 10 (60%) meningiomas, although detection varied between observers from 40% to 80%. Each reviewer had one false positive result, two reported a dural tail with a chromophobe adenocarcinoma and one with a toxoplasma meningoencephalitis. When a dural tail is seen an associated mass is most likely a meningioma. It is uncertain whether the dural tail represents neoplastic infiltration beyond the margins of the meningioma. This should be considered when planning treatment.
在人类中，硬脑膜尾征是在对比增强T1加权磁共振图像上看到的一种征象。这一发现被认为是脑膜瘤的特异性表现。本研究的目的是确定猫和狗中硬脑膜尾征出现的频率，以及它是否是这些物种中脑膜瘤的特异性征象。回顾了18只狗和4只猫的磁共振检查结果，这些动物均有确诊。诊断包括10例脑膜瘤（7只狗和3只猫）、3例胶质瘤、2例垂体瘤、其他两种肿瘤类型各1例以及5例因炎症性疾病导致肿块病变的病例。三位作者在不知道诊断结果的情况下，独立评估对比增强T1加权图像上是否存在硬脑膜尾征。将结果与每位患者的诊断进行比较，并比较各位审阅者的表现。当他们的结果取平均值时，审阅者报告10例脑膜瘤中有6例（60%）存在硬脑膜尾征，尽管观察者之间的检测率从40%到80%不等。每位审阅者都有一个假阳性结果，两位报告在嫌色性腺癌时出现硬脑膜尾征，一位报告在弓形虫性脑膜脑炎时出现硬脑膜尾征。当看到硬脑膜尾征时，相关肿块很可能是脑膜瘤。硬脑膜尾征是否代表脑膜瘤边缘以外的肿瘤浸润尚不确定。在制定治疗方案时应考虑到这一点。
