What's already known about this topic?
The severe form of prenatal cortical hyperostosis affects fetuses before 35 weeks of gestation (WG) causing severe bone injuries, fetal hydrops, and polyhydramnios. It is associated with a high rate of morbidity and mortality. Accordingly, many pregnancies are terminated. The mild form usually occurs later, with milder bone lesions and a better prognosis.
What does this study add?
Even the severe form may have a favorable outcome because the disease may resolve. Computed Tomography (CT) scan of the fetus with 3D reconstruction of the bones is of a great help to visualize hyperostosis.
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