Frogs & toads are batracians, so I looked up "excencephaly"+ "frog": "Two diagnostic signs have been described to aid in diagnosis: the “Mickey Mouse” sign and the “frog eye” sign. The “Mickey Mouse” sign depicts the fetal cortex floating in the amniotic fluid without cranial structures above it, giving it the look of Mickey Mouse ears.7 The “frog eye” sign depicts the protruding orbital structures associated with anomalous development of the cortex seen in anencephaly-acrania.12,13"
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