Yang I K, Bahk Y W, Choi K H, Paik M W, Shinn K S
Department of Radiology, Holy Family Hospital, Catholic University Medical College, Kyung Ki Do, Korea.
Neuroradiology. 1994 Aug;36(6):453-5. doi: 10.1007/BF00593682.
Posterior apophyseal ring fracture (PARF) of the lumbar spine is an uncommon injury thought usually to occur in adolescence. We analysed CT findings in 20 cases (19 patients), whose age ranged from 16 to 45 years (average 30 years). The PARF could be divided into two distinct groups on the basis of the shape and location of the fracture and the defect of the vertebral rim. In group 1 (2 cases), PARF involved the central aspect of the inferior vertebral rim and bone fragments were large and broad-based. In group 2, PARF were located at the posterolateral margin of the superior vertebral rim and bone fragments were small and focal. The great majority of previously reported cases belonged to our group 1. A pathogenesis for each group is suggested.
腰椎后弓环骨折（PARF）是一种罕见的损伤，通常被认为发生于青少年时期。我们分析了20例（19名患者）的CT表现，患者年龄范围为16至45岁（平均30岁）。根据骨折的形状和位置以及椎体边缘的缺损情况，PARF可分为两个不同的组。在第1组（2例）中，PARF累及下椎体边缘的中央部分，骨块大且基底宽。在第2组中，PARF位于上椎体边缘的后外侧，骨块小且局限。先前报道的绝大多数病例属于我们的第1组。我们提出了每组的发病机制。
