PU Fetal Anomaly Detection

Question 1

What ultrasound finding is the hallmark of anencephaly?

Accepted Answer

Absent cranial vault above the orbits

Answer

Enlarged head

Answer

Fluid-filled brain

Answer

Choroid plexus cysts

Question 2

What is the lemon sign associated with?

Accepted Answer

Spina bifida/open neural tube defect

Answer

Anencephaly

Answer

Hydrocephalus

Answer

Holoprosencephaly

Question 3

A double bubble sign on fetal ultrasound is diagnostic of which condition?

Accepted Answer

Duodenal atresia

Answer

Esophageal atresia

Answer

Gastroschisis

Answer

Omphalocele

Question 4

What is gastroschisis?

Accepted Answer

A defect in the abdominal wall to the right of the umbilicus with herniated bowel

Answer

A covered midline abdominal wall defect containing liver

Answer

A defect with a membrane covering the organs

Answer

Herniation of organs through the umbilical cord

Question 5

Which marker on second-trimester ultrasound is associated with Down syndrome (Trisomy 21)?

Accepted Answer

Absent or hypoplastic nasal bone

Answer

Enlarged cerebellum

Answer

Thick corpus callosum

Answer

Large thymus

Question 6

What is the banana sign in fetal ultrasound?

Accepted Answer

Curved shape of the cerebellum due to hindbrain herniation in spina bifida

Answer

Bent femur appearance

Answer

Curved spine in scoliosis

Answer

Banana-shaped kidney