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Thoracic Vertebral Canal Stenosis Associated with Vertebral Arch Anomalies in Small Brachycephalic Screw-Tail Dog Breeds
Veterinary and Comparative Orthopaedics and Traumatology ( IF 1.3 ) Pub Date : 2020-12-07 , DOI: 10.1055/s-0040-1721375
Alessandro Conte 1 , Marco Bernardini 2, 3 , Steven De Decker 4 , Cristoforo Ricco 5 , Sebastien Behr 5 , Daniel Sanchez-Masian 6 , Guinio B Cherubini 7 , Luisa De Risio 8 , Rodrigo Gutierrez-Quintana 9
Affiliation  

Objective The aim of this study was to describe clinical and imaging features of thoracic vertebral canal stenosis secondary to the hypertrophy of the vertebral lamina and articular processes in screw-tail brachycephalic dog breeds, to evaluate the prevalence of the malformation in a large group of screw-tail dog breeds and to determine if degree of stenosis is associated with presence of neurological signs.

Study Design This is a retrospective multicentric study.

Materials and Methods Clinical records of 185 screw-tail brachycephalic dogs (French Bulldogs, English Bulldogs, Boston Terriers) and Pugs were reviewed. Ten dogs with neurological deficits secondary to thoracic vertebral canal stenosis diagnosed on magnetic resonance imaging were identified (Group 1). Neurologically normal dogs (n = 175) of the same breeds underwent computed tomographic imaging of the thoracic vertebral column for other medical reasons (Group 2). Cross-sectional measurements were used to calculate a stenotic ratio.

Results Group 1 consisted of three French Bulldogs, six English Bulldogs and one Pug. Eight were males. Most dogs presented with progressive non-painful pelvic limbs ataxia and paresis. Twenty stenotic sites were identified with the most common being T4–T5. Three of ten dogs were treated surgically and all had a good long-term outcome. In Group 2, 33 of 175 dogs had one or more stenotic sites with the most common being T2–T3. The degree of the stenosis was significantly higher in Group 1 (p = 0.019). A stenotic ratio of 0.56 had sensitivity and specificity of 67% to differentiate between dogs with and without neurological signs.

Conclusion Cranial thoracic vertebral canal stenosis is observed predominantly in young male Bulldogs, but not all stenoses are clinically relevant.



中文翻译:

胸椎管狭窄与小型短头螺旋尾犬的椎弓异常有关

目的 本研究的目的是描述螺旋尾短头犬品种继发于椎板和关节突肥大的胸椎管狭窄的临床和影像学特征,以评估大群螺钉畸形的患病率。 - 尾犬品种并确定狭窄程度是否与神经系统症状的存在有关。

研究设计 这是一项回顾性多中心研究。

材料和方法 回顾了 185 只螺旋尾短头犬(法国斗牛犬、英国斗牛犬、波士顿梗犬)和哈巴狗的临床记录。确定了 10 只因磁共振成像诊断出的胸椎管狭窄继发神经功能缺损的狗(第 1 组)。 出于其他医学原因(第 2 组),对同一品种的神经功能正常的狗(n = 175)进行了胸椎的计算机断层扫描。横截面测量用于计算狭窄比率。

结果 第 1 组由三只法国斗牛犬、六只英国斗牛犬和一只哈巴狗组成。八个是男性。大多数狗表现为进行性无痛性骨盆四肢共济失调和麻痹。确定了 20 个狭窄部位,最常见的是 T4-T5。10 只狗中有 3 只接受了手术治疗,并且都有良好的长期结果。在第 2 组中,175 只狗中有 33 只有一个或多个狭窄部位,最常见的是 T2-T3。第 1 组的狭窄程度显着更高 ( p  = 0.019)。0.56 的狭窄比率具有 67% 的敏感性和特异性来区分有和没有神经系统症状的狗。

结论 颅胸椎管狭窄主要在年轻的雄性斗牛犬中观察到,但并非所有的狭窄都具有临床意义。

更新日期:2020-12-08
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