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Exencephaly

Exencephaly
(A) Coronal view of a first-trimester fetus with exencephaly. The head is wide and bilobed ("Mickey Mouse" sign).
(B) An oblique view of an exencephalic fetus. Normal facial bones are seen, but no cranial vault surrounds the exposed brain.
(C) Three-dimensional surface rendering demonstrating the bilobed brain.
Graphic 72765 Version 3.0