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Absence of a calvarium with deformed and degenerated brain tissues

Three-dimensional HDlive rendered images at 17 weeks of gestation with deformed and degenerated brain tissues (white arrow), and absence of the right upper limb (white open arrow). (Source: Sugiura T, Sato Y, Nakanami N, Tsukimori K. Prenatal sonographic image of sirenomelia with anencephaly and craniorachischisis totalis. Case Rep Obstet Gynecol 2018;2018:7058253. Creative Commons Attribution [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)