Objective The aim of this study was to describe the surgical technique and outcomes of dogs with congenital thoracic vertebral body malformations (CTVBM) treated with unilateral vertebral distraction and stabilization with monocortical screws and polymethylmethacrylate (PMMA).

Study Design Medical records of 10 client-owned dogs with CTVBM were retrospectively searched for signalment, history, neurological examination, neurological grade based on the modified Frankel scale (MFS), diagnostic method, CTVBM location, Cobb's angle, and vertebral canal angle (VCA), surgical procedure, complications and long-term follow-up.

Results One dog suffered cardiac arrest 24 hours post-surgery and died. Median follow-up in nine dogs was 26.5 months (12–50 months). Cobb's angle improved from 33–83 to 10–46 degrees and the VCA ratio from 97–138 to 122–164 degrees. The MFS improved from 3 (n = 3)–4 (n = 7) to 4 (n = 2)–6 (n = 7). Seven dogs recovered full function. Nine dogs improved after surgery compared with preoperative status, recovering ambulation when lost or achieving normal neurological examination in seven cases. No complications were reported during the follow-up period (12–50 months).

Conclusion Unilateral transthoracic vertebral distraction and stabilization with monocortical screws and PMMA for treatment of compressive myelopathy due to CTVBM achieved long-term neurological improvement in 9 of 10 dogs.

目的 本研究的目的是描述先天性胸椎体畸形 (CTVBM) 犬用单皮质螺钉和聚甲基丙烯酸甲酯 (PMMA) 进行单侧椎体牵引和稳定治疗的手术技术和结果。

研究设计 对 10 只客户拥有的 CTVBM 病历进行回顾性搜索，包括信号、病史、神经系统检查、基于改良弗兰克尔量表 (MFS) 的神经系统分级、诊断方法、CTVBM 位置、Cobb 角和椎管角 (VCA) )、手术过程、并发症和长期随访。

结果 一只狗在手术后 24 小时心脏骤停并死亡。9 只狗的中位随访时间为 26.5 个月（12-50 个月）。Cobb 角从 33-83 度提高到 10-46 度，VCA 比从 97-138 度提高到 122-164 度。MFS 从 3 ( n  = 3)–4 ( n  = 7) 提高到 4 ( n  = 2)–6 ( n  = 7)。七只狗恢复了全部功能。与术前状态相比，术后有 9 只狗在手术后有所改善，其中 7 只狗失去行走能力或神经系统检查正常。随访期间（12-50 个月）未报告并发症。

结论 单侧皮质螺钉和 PMMA 的单侧经胸椎体牵张和稳定治疗 CTVBM 引起的压迫性脊髓病在 10 只狗中有 9 只获得了长期的神经功能改善。