Torrington Orthopaedics, Brighouse, United Kingdom.
Ospedale Veterinario "I Portoni Rossi", Zola Pedrosa, Italy.
Vet Comp Orthop Traumatol. 2021 May;34(3):191-199. doi: 10.1055/s-0040-1721375. Epub 2020 Dec 7.
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.
This is a retrospective multicentric study.
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 ( = 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.
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 ( = 0.019). A stenotic ratio of 0.56 had sensitivity and specificity of 67% to differentiate between dogs with and without neurological signs.
Cranial thoracic vertebral canal stenosis is observed predominantly in young male Bulldogs, but not all stenoses are clinically relevant.
本研究旨在描述因椎板和关节突肥大导致的短头颅骨椎骨管狭窄的临床和影像学特征，评估该畸形在大量短头颅骨犬种中的流行程度，并确定狭窄程度是否与神经症状的存在相关。
这是一项回顾性多中心研究。
对 185 只短头颅骨犬（法国斗牛犬、英国斗牛犬、波士顿梗犬）和哈巴狗的临床记录进行了回顾。在磁共振成像（MRI）上诊断为胸椎管狭窄继发神经功能缺损的 10 只犬（第 1 组）被识别出来。由于其他医学原因接受胸部脊柱 CT 成像的 175 只神经正常的相同品种的犬（第 2 组）。使用横截面积测量值来计算狭窄比。
第 1 组包括 3 只法国斗牛犬、6 只英国斗牛犬和 1 只哈巴狗。8 只为雄性。大多数犬表现为进行性、无痛性骨盆支共济失调和轻瘫。20 个狭窄部位被确定，最常见的是 T4-T5。10 只犬中有 3 只接受了手术治疗，所有犬的长期预后均良好。在第 2 组中，175 只犬中有 33 只犬存在一个或多个狭窄部位，最常见的是 T2-T3。第 1 组的狭窄程度明显更高（P=0.019）。狭窄比为 0.56 时，其灵敏度和特异性分别为 67%，可用于区分有和无神经症状的犬。
颅胸椎管狭窄主要见于年轻雄性斗牛犬，但并非所有狭窄都是临床相关的。
