CASE 106
Used with permission from McGahan JP, Benacerraf BR: Fetal head and brain. In McGahan JP, Goldberg BB [eds]: Diagnostic Ultrasound, 2nd ed. New York: Informa Healthcare USA, 2008.
History: A 36-year-old woman presents for level II obstetric ultrasound because of advanced maternal age.
1. What should be included in the differential diagnosis? (Choose all that apply.)
A. Arnold-Chiari type II malformation
E. Agenesis of the corpus callosum
2. In agenesis of the corpus callosum, which portion of the lateral ventricles is typically dilated?
B. Body of the lateral ventricles
3. Which of the following statements concerning agenesis of the corpus callosum is false?
B. The cavum septi pellucidi is absent.
C. Ventriculomegaly is present.
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