Case 75 A newborn with seizures. (A,B) Axial computed tomography images: There is absence of most of the cerebrum, with only a small amount of tissue along the falx. Cerebrospinal fluid (CSF) fills the cranial vault. The posterior fossa, thalami, and falx are intact (arrow). • Hydranencephaly: An absent cerebrum with intact falx, thalami, and posterior fossa structures is consistent with hydranencephaly. • Alobar holoprosencephaly:
Clinical Presentation
Imaging Findings
Differential Diagnosis
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