Image Question-54
Case contributed by Andressa Wiltgen
What is the diagnosis?
[A] Achondroplasia
[B] Anencephaly
[C] Crouzon syndrome
[D] Atelosteogenesis
“Frog eye” appearance – USG – Fetal skull
“Frog eye” appearance
Absence of brain and calvaria superior to the orbits
Seen on views of the fetal head.
| “Frog eye” appearance | USG – Fetal skull | |
| Ultrasound features of anencephaly | In First trimesters | “Mickey-mouse” face |
| Ultrasound features of anencephaly | In Second trimesters | “Frog eye” sign |
“Frog eye” appearance due to absent cranial bone/brain and bulging eyes.
Fetal profile with no skull cap.
Anencephaly –
Ultrasound features of anencephaly
“Mickey-mouse” face -In First trimesters – Ultrasound features of anencephaly
“Frog eye” sign – In Second trimesters – Ultrasound features of anencephaly
Ultrasound features of anencephaly are different in the first and second trimesters.
In the first-trimester “mickey-mouse” face
In Second trimester- typical appearance of anencephaly is “frog eye” sign
Absence of brain and calvaria superior to the orbits on coronal views of the fetal head.
“Frog eye” appearance due to absent cranial bone/brain and bulging eyes. Sagital plane showing the fetal profile with no skull cap.
