中文摘要：

目的 探讨脊髓纵裂的产前超声图像特征.方法 对1例怀疑椎管内肿瘤的胎儿行系统产前超声检查,超声诊断为脊髓纵裂,总结胎儿脊髓纵裂产前超声诊断特点,与引产后胎儿的高频超声、X线、MRI及病理解剖进行对比研究,并对脊髓纵裂产前诊断相关文献回顾分析.结果 本例脊髓纵裂发生于胸6~9水平,椎管内可见圆形高回声占位病变,脊髓受压分成两半,于远端汇合,相应的椎弓骨化中心明显增宽.脐血染色体核型正常.本例终止妊娠后,标本行产后超声、X线照片、MRI检查及病理解剖,证实产前超声诊断.结论 脊髓纵裂有特征性超声表现,产前超声可作出诊断.

英文摘要：

Objective To investigate the prenatal ultrasonic manifestations of diastematomyelia. Methods A fetus was identified as diastematomyelia after took detailed antenatal ultrasound examination for Suspected intraspinal tumor. The prenatal ultrasonic manifestations of the abnormal spinal anatomy were com- pared with the features of the postnatal high-frequency ultrasound, X-ray, MRI and autopsy examinations. Twenty-five cases of diastematomyelia were reviewed and retrieved by PubMed system. Results In our case, the ultrasonic examination revealed a circular hyper-echogenic mass in the enlarged spinal canal, infe- rior fusion of two longitudinal divisions of the thoracic cord, and the widening ossification center at the T6-3~9 level. The chromosomal analysis on cord blood cell had normal karyotype, which was confirmed by postmor- tem X-ray, MRI and autopsy. Conclusion Diastematomyelia can be prenatally diagnosed due to the charac- teristic ultrasonic features.