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Korean Journal of Obstetrics & Gynecology 2003;46(7):1445-1452.
Published online July 1, 2003.
Three Cases of Spina Bifida by Antenatal Ultrasonogram.
Moon Jung Kim, Mi Kyung Kim, Hyun Ju Park, Hyun Ju Seol, Ji Hye Shin, Moon Jung Kang, Hyun Suk An
Department of Obstetrics and Gynecology, Ilsin Christian Hospital, Busan, Korea.
The prenatal diagnosis of spina bifida includes the combined use of maternal serum alpha-fetoprotein (MSAFP) screening and fetal sonography. On ultrasonogram, spina bifida is characterizd by visualization of the spinal defect and associated cranial abnomalities: the Lemon sign, the Banana sign, ventriculomegaly, small biparietal diameter, and obliteration of the cisterna magna. We should now be able to rely on ultrasound as the main technique for diagnosis of spina bifida when MSAFP is elevated. Recently, we have experienced three cases of spina bifida diagnosed with meningomyelocele, lemon sign, banana sign and ventriculomegaly on ultrasonogram at respectively 18+3, 18, and 18+6 weeks of gestation. We present these cases with a brief review of literatures.
Key Words: Spina bifida, MSAFP, Lemon sign, Banana sign, Meningomyelocele

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