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Prenatal Sonographic Diagnosis of Iniencephaly

Iniencephaly is a rare defect caused by improper closure of the neural tube. The incidence is 0.1-10 per 10,000 live births. The head is disproportionately large as compared to the body and displays excessive retroflexion. The neck is absent with the face directed upward. Prenatal sonography is an accurate means of identifying this anomaly.