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Ultrasound scan of pregnant woman in whom fetal acrania was diagnosed (5)

Scan performed using the transvaginal probe in 2D rendering in a 21-year-old gravida 1, para 0 woman at 13 weeks gestational age. Ultrasound diagnosis was acrania, confirmed at autopsy. Sagittal cross-section. Amniotic fluid anechoic. Yellow arrows: brain structures covered with rippling thin membrane similar to meninges--the “beret” sign. Blue arrows: orbits. Red arrows: bone edge on the border of calvarium defect. (Source: Szkodziak P, Krzyżanowski J, Krzyżanowski A, et al. The role of the "beret" sign and other markers in ultrasound diagnostic of the acrania-exencephaly-anencephaly sequence stages. Arch Gynecol Obstet 2020;302[3]:619-28. Creative Commons Attribution 4.0 International License,