Page 58 - SONO 260 The Fetal Head and Brain
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ARNOLD-CHIARI II MALFORMATION AND SPINA BIFIDA
¢In the presence of spina bifida, there are several notable changes that occur within the brain and skull.
The frontal bones become flattened and will yield a lemon shape to the cranium, which is referred to as the “lemon” sign, often referred to as scalloping of the frontal bones.
The cerebellum will become displaced inferiorly and posteriorly and appear curved in the presence of spina bifida, which is referred to as the “banana” sign.
