Koktener Asli, Dilmen Gulcin, Kurt Aydin
Department of Radiology, Fatih University School of Medicine, Ankara, Turkey.
J Perinat Med. 2007;35(3):217-9. doi: 10.1515/JPM.2007.060.
The purpose of this study was to evaluate cisterna magna size of the fetuses between 16 and 24 weeks of gestation, and to establish a normogram for cisterna magna measurements during gestation.
A prospective study of normal singleton pregnancies was established. Measurement of the fetal cisterna magna was performed by transabdominal ultrasonography between 16 and 24 weeks of gestation in 194 fetuses.
A linear correlation was obtained between gestational age (GA) and cisterna magna (R(2)=0.75, P<0.0001). A linear correlation was also found between biparietal diameter and cisterna magna (R(2)=0.74, P<0.0001). The normal mean (+/-SD) for each gestational week was defined.
The present data offer the normal range of the cisterna magna. Cisterna magna measurement may provide normative data for fetal growth and development. Abnormal measurement of cisterna magna may be a clue for posterior fossa pathologies or a chromosomal disorder.
本研究旨在评估妊娠16至24周胎儿的小脑延髓池大小，并建立孕期小脑延髓池测量的正常参考图。
开展一项针对正常单胎妊娠的前瞻性研究。在194例妊娠16至24周的胎儿中，通过经腹超声检查测量胎儿小脑延髓池。
胎龄（GA）与小脑延髓池之间存在线性相关性（R² = 0.75，P < 0.0001）。双顶径与小脑延髓池之间也发现线性相关性（R² = 0.74，P < 0.0001）。确定了每个孕周的正常均值（±标准差）。
目前的数据提供了小脑延髓池的正常范围。小脑延髓池测量可为胎儿生长发育提供规范性数据。小脑延髓池测量异常可能是后颅窝病变或染色体疾病的一个线索。
