Department of Orthopedics, Nassau University Medical Center, East Meadow, NY.
Department of Orthopedics, Good Samaritan Hospital, West Islip, NY.
Spine (Phila Pa 1976). 2021 Feb 1;46(3):E213-E215. doi: 10.1097/BRS.0000000000003804.
Case report (level V evidence).
We report a case of a 33-year-old man with Marfan syndrome that visited our clinic for left knee pain and stiffness. Radiographs of the left knee and lumbar spine demonstrated a spinal rod in the posterolateral left knee and its origin being a broken rod from his previous unilateral spinal fusion 17 years prior.
Spinal arthrodesis is a common treatment modality for a wide range of spinal pathologies including infection, trauma, congenital and developmental deformities, and degenerative conditions. A rare complication that may arise from said procedure is implant migration, most often a result of pseudoarthrosis.
Description of the case report.
Patient was taken to the operating room 2 weeks later for an uneventful removal of the implant and immediate improvement with pain and range of motion.
Spinal implant migration is a rare complication most often due to implant failure from pseudoarthrosis. In the case presented, this phenomenon was likely attributed to the use of unilateral instrumentation coupled with Marfan syndrome, shown to lead to insufficient implant stability and poorer fusion rates, respectively.Level of Evidence: 5.
病例报告（证据级别 V）。
我们报告了一例 33 岁的马凡综合征男性患者，因左膝疼痛和僵硬就诊于我院。左膝和腰椎的 X 光片显示左膝后外侧有一根脊柱棒，其起源于 17 年前单侧脊柱融合术的断裂棒。
脊柱融合术是治疗多种脊柱疾病的常用方法，包括感染、创伤、先天性和发育性畸形以及退行性疾病。该手术可能出现的一种罕见并发症是植入物迁移，最常见的原因是假关节。
病例报告描述。
患者在 2 周后被送往手术室，顺利取出植入物，疼痛和活动范围立即改善。
脊柱植入物迁移是一种罕见的并发症，最常见的原因是假关节导致植入物失效。在本例中，这种现象可能归因于单侧器械的使用，再加上马凡综合征，分别导致植入物稳定性不足和融合率降低。
5 级。
