First trimester ultrasound diagnosis of exencephaly
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چکیده
Objective The introduction of first trimester nuchal translucency measurement has resulted in earlier identification of foetuses with exencephaly. Exencephaly is an uncommon congenital malformation in which the flat bones of calvaria are absent leaving the brain completely exposed or protrudes through the defect in the cranial vault. Anencephaly may ensue as a result of prolonged exposure of the developing encephalon to amniotic fluid and trauma in utero.
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