Kim Uhjin, Chang Jinhwa, Yoon Kwangyong, Kim Byungjin, Ban Jiyoung, Hyun Sang-Hwan, Chang Dongwoo, Lee Namsoon
Section of Veterinary Medical Imaging, College of Veterinary Medicine, Chungbuk National University, Cheongju, South Korea.
Korea Animal Medical Center, Cheongju, South Korea.
Vet Radiol Ultrasound. 2025 Jan;66(1):e13469. doi: 10.1111/vru.13469.
The lumbosacral transitional vertebra (LTV) is an abnormally formed vertebra that can be associated with cauda equina syndrome, lumbosacral (LS) degeneration, and pelvic rotation. However, there is little information on LTV in small-breed dogs, and no studies have investigated the association between LTV and LS diseases or degenerative changes in the coxofemoral joints. The purpose of this multicenter, retrospective, and cross-sectional study was to determine the prevalence of LTV in small-breed dogs (<10 kg), classify the type of LTV, and identify its association with degenerative changes in the LS and coxofemoral joints using CT images. Lumbosacral transitional vertebrae were divided into four types based on their morphological characteristics. Lumbosacral transitional vertebrae were detected in 127 of 812 dogs (15.6 %). The prevalence of LTV was higher in French bulldogs (33.3%), Schnauzers (33.3%), and Dachshunds (25%) than in other breeds. Type 2 was the most common, with morphological variations in the transverse processes, and 36.2% of the LTV group showed multiple types of LTV. Dogs with LTV tended to have LS spondylosis deformans (OR, 2.8) and pelvic rotation (OR, 6.4) compared with dogs without LTV. Type 4 LTV was significantly associated with pelvic rotation (p < 0.0001). This is the first study to investigate the prevalence, characteristics, and characteristics of LTV in small-breed dogs using CT images. The results of this study may contribute to a better understanding of this congenital anomaly in small-breed dogs. CT can evaluate LTV, which could predispose a dog to LS spondylosis deformans or pelvic rotation.
腰骶部移行椎（LTV）是一种形态异常的椎骨，可与马尾综合征、腰骶部（LS）退变及骨盆旋转相关。然而，关于小型犬LTV的信息较少，尚无研究调查LTV与LS疾病或股髋关节退变之间的关联。本多中心、回顾性横断面研究的目的是利用CT图像确定小型犬（<10 kg）中LTV的患病率，对LTV类型进行分类，并确定其与LS及股髋关节退变的关联。腰骶部移行椎根据其形态特征分为四种类型。812只犬中有127只（15.6%）检测到腰骶部移行椎。法国斗牛犬（33.3%）、雪纳瑞犬（33.3%）和腊肠犬（25%）的LTV患病率高于其他品种。2型最为常见，横突有形态变异，36.2%的LTV组显示有多种类型的LTV。与无LTV的犬相比，有LTV的犬更易出现LS脊柱关节病（比值比，2.8）和骨盆旋转（比值比，6.）。4型LTV与骨盆旋转显著相关（p < 0.0001）。这是第一项利用CT图像研究小型犬LTV患病率、特征的研究。本研究结果可能有助于更好地理解小型犬的这种先天性异常。CT可评估LTV，其可能使犬易患LS脊柱关节病或骨盆旋转。
