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Asli Koktener, Gulcin Dilmen, Aydin Kurt

The cisterna magna size in normal second-trimester fetuses

Keywords: Cisterna magna, fetus, ultrasound

Objective: 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.

Methods: 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.

Results: A linear correlation was obtained between gestational age (GA) and cisterna magna (R²=0.75, P<0.0001). A linear correlation was also found between biparietal diameter and cisterna magna (R²=0.74, P<0.0001). The normal mean (±SD) for each gestational week was defined.

Conclusion: 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.

Journal of Perinatal Medicine, Walter de Gruyter

Print ISSN: 1619-3997
Volume: 35, 06/2007
Pages: 217 - 219

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