RESUMEN
Objective To explore the value of prenatal ultrasound in diagnosis of omphalocele-exstrophy-imperforate anusspinal defects (OEIS) in first trimester.Methods Prenatal ultrasonic characteristics of 10 fetuses with OEIS complex in first trimester were retrospectively analyzed and compared with autopsy results.Results Cystic bulging in the lower anterior abdominal wall was observed in all 10 fetuses.Spinal scoliosis dysplasia was found in 10 fetuses,with myelomeningocele in 3 fetuses.No normal bladder was visualized in 8 fetuses.Thickened nuchal translucency was noticed in 5 fetuses,among which neck lymphatic hydrocele was found in 1 fetus.The bilateral clubbed feet and left lower mutilation was observed in 1 fetus,respectively.All 10 OEIS complex fetuses were found accompanied with short umbilical cord,while single umbilical artery and umbilical cord cyst were found in 4 and 1 fetus,respectively.Autopsy showed abdominal wall defects with exstrophy in 10 fetuses.However,no complete cystic bulging was found.Besides,autopsy also showed pubic symphysis separation and bladder exstrophy in 10 fetuses without obvious genitalia nor anus.Conclusion Cystic bulging in the lower anterior abdominal wall is the most common prenatal ultrasonic characteristic of OEIS complex in first trimester.