Case contributed by Dr Shrikant Nagare


Patient came for second trimester scan (16/40)

Patient Data

Gender: Female

On ultrasound examination of the fetus, the fetal skull bones and brain parenchyma were not visualized. Biparietal diameter and head circumference could not be measured. 

A coronal section through the fetal face was showing a 'frog' like bulging of eyes and absent frontal bones. 

Case Discussion

Anencephaly is a lethal congenital anomaly which can be detected on ultrasound as early as 11 weeks of gestation.

If some amount of neural tissue is present this condition is termed as exencephaly.

Polyhydramnios is usually associated with neural tube defects. Associated anomalies should be looked for like spinal dysraphisms, diaphragmatic hernias and amniotic band syndrome.

Maternal serum alpha feto protein levels are raised in all the neural tube defects.

Folic acid supplements in reproductive age group is helpful for prevention of neural tube defects. No treatment option is available for anencephaly.

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Case information

rID: 35666
Published: 16th Apr 2015
Last edited: 14th Aug 2019
System: Obstetrics
Inclusion in quiz mode: Included

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