Department of Orthopaedic Surgery, Maulana Azad Medical College and Associated Lok Nayak Hospital, New Delhi, India.
Central Institute of Orthopaedics, Vardhman Mahavir Medical College and Associated Safdarjung Hospital, New Delhi, India.
Spinal Cord Ser Cases. 2021 Apr 13;7(1):30. doi: 10.1038/s41394-021-00399-1.
Posterior fracture-dislocation of fifth lumbar vertebra (L5) is a rare injury pattern. Existing Aihara classification system lacks its mention.
We report two cases of posterior fracture-dislocation of L5 with comminuted fracture of body that presented with cauda equina syndrome. The smaller anteroinferior vertebral body fragment of L5 had its relationship maintained with sacrum, whereas the larger posterosuperior fragment of the body was retropulsed. Decompression and instrumented fusion through posterior approach yielded good clinical outcome.
We also present literature review with special emphasis on fracture characteristics and suggest its possible inclusion as a separate sub-type in existing Aihara classification.
第五腰椎（L5）后骨折脱位是一种罕见的损伤模式。现有的 Aihara 分类系统没有提到这一点。
我们报告了两例 L5 后骨折脱位合并 L5 体粉碎性骨折的病例，这些病例表现为马尾综合征。L5 的较小的前下椎体碎片与骶骨保持关系，而较大的体后上碎片向后突出。后路减压和器械融合取得了良好的临床效果。
我们还对文献进行了回顾，特别强调了骨折的特征，并建议将其作为现有 Aihara 分类的一个单独亚型纳入其中。
