Cao L B, Zhan A L, Cao Q X
Affiliated Hospital, Qingdao Medical College.
Chin Med J (Engl). 1992 Oct;105(10):866-9.
Clinical, radiological and CT manifestations of 36 patients with lumbar posterior marginal intraosseous cartilaginous node (LPMN) were analysed. Of the 36 patients, 27 were male and 9 female, most of them were young adults. The posteroinferior margin of L4 was the commonest site and the posterosuperior margin might also be involved. Two patients had multiple lesions. Typical radiological findings included a defect in the posteroinferior (or posterosuperior) margin of the affected vertebral body and behind the defect a bony ridge protruding into the spinal canal. CT scan showed a cartilaginous node in the posterior zone of the vertebral plate. It is suggested that LPMN was the result of disc material herniating into the posterior aspect of vertebral body through ruptured cartilaginous end-plate during the adolescence, similar to that of the limbus vertebra. Hyperflexion and hyperextension of the spine probably play an important role in the pathogenesis. The existence of LPMN favours posterior disc herniation in the same disco-vertebral junction.
分析了36例腰椎后缘骨内软骨结节（LPMN）患者的临床、放射学及CT表现。36例患者中，男性27例，女性9例，多数为青壮年。L4后下缘是最常见部位，后上缘也可能受累。2例患者有多处病变。典型的放射学表现包括受累椎体后下缘（或后上缘）有缺损，缺损后方有一骨嵴突入椎管。CT扫描显示椎板后区有一软骨结节。提示LPMN是椎间盘物质在青少年期通过破裂的软骨终板疝入椎体后方所致，类似于椎体缘离断症。脊柱的过度屈伸可能在发病机制中起重要作用。LPMN的存在有利于同一椎间盘-椎体交界处的椎间盘后突。
