Chapter 24 ( The Fetal Head and Neck)

Question 1

The choroid plexus cyst could be associated with an increase risk of:

Answer 1

Trisomy 18

Question 2

All of the following are sonographic findings of Arnold-Chiari 2 malformation except:
A. Enlarged massa intermedia
B. Hydrocephalus
C. Obliteration of the cisterna magna
D. strawberry sign

Answer 2

D. strawberry sign

Question 3

All of the following are midline brain structures except:
A. interhemispheric fissure
B. cavum septum pellucidum
C. lobes of the thalamus
D. third ventricle

Answer 3

C. lobes of the thalamus

Question 4

The double fold of dura mater used to divide the cerebral hemispheres is the:

Answer 4

falx cerebri

Question 5

The development of fluid-filled cleft within the cerebrum is consistent with:

Answer 5

Schizencephaly

Question 6

The anechoic midline brain structure located between the frontal horns of the lateral ventricles is the:

Answer 6

Cavum Septum Pellucidum

Question 7

The sunburst of the cerebral sulci is a sonographic finding of:

Answer 7

Agenesis of the corpus callosum

Question 8

The interthalamic adhesion (massa intermedia) passes through the:

Answer 8

third ventricle

Question 9

The most severe form of holoprosencephaly is:

Answer 9

alobar

Question 10

The third ventricle is located:

Answer 10

between the two lobes of the thalamus

Question 11

What chromosomal aberration is most often associated with holoprosencephaly?

Answer 11

Trisomy13

Question 12

The third ventricle communicates with the fourth ventricle at the:

Answer 12

Aqueduct of Sylvius

Question 13

The fourth ventricle is located:

Answer 13

anterior to the cerebellar vermis

Question 14

The structure located between the two lobes of the cerebellum is the:

Answer 14

cerebellar vermis

Question 15

The most accurate measurement at estimating gestational age from the below list is:
A. BPD
B. HC
C. Transcerebellar measurement
D. Lateral ventricle

Answer 15

HC

Question 16

The cisterna magna should not exceed___ in the transcerebellar plane.

Answer 16

10mm

Question 17

A strawberry-shaped skull is commonly associated with:

Answer 17

Trisomy 18

Question 18

The band of tissue that allows communication between the right and left cerebral hemispheres is the:

Answer 18

corpus callosum

Question 19

The cloverleaf-shaped skull is related to:

Answer 19

Thanatophoric dysplasia

Question 20

A lemon-shaped skull is related to:

Answer 20

Spina bifida AND Arnold-Chiari 2 malformation

Question 21

All of the following are sonographic features of alobar holoprosencephaly except:
A. cyclopia
B. monoventricle
C. dorsal cyst
D. fused thalamus

Answer 21

C. Dorsal cyst

Question 22

Atypical facial features are most commonly associated with what cerebral abnormality ?

Answer 22

holoprosencephaly

Question 23

The dangling choroid sign is synonymous with:

Answer 23

ventriculomegaly

Question 24

The most common cause of hydrocephalus in utero is:

Answer 24

aqueductal stenosis

Question 25

The sonographic finding of a fluid-filled cranium with absence of cerebral tissue is consistent with:

Answer 25

hydranencephaly

Question 26

The lack of sulci within the fetal cerebrum is a reliable indicator of:

Answer 26

Lissencephaly

Question 27

Elevation of the tentorium and an enlarged cisterna magna that communicates with a dilated fourth ventricle is consistent with:

Answer 27

Dandy-Walker Malformation

Question 28

Agenesis or hypoplasia of the cerebellar vermis results in what cerebral malformation?

Answer 28

Dandy-Walker Malformation

Question 29

The condition in which the frontal horns are small and the occipital horns are enlarged is referred to as:

Answer 29

colpocephaly

Question 30

Following an intracranial hemorrhage, a cyst is noted within the cerebrum that communicates with the lateral ventricle. This is referred to as:

Answer 30

Porencephaly