Penny Chapter 24: The Fetal Head and Brain Review Questions

which of the following would be the most likely fetal cranial findings with TORCH infections? a. intracranial calcifications b. cerebral atrophy c. porencephaly d. scaphocephaly

a. intracranial calcifications

the most severe form of holoprosencephaly is:

b. alobar

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

b. corpus callosum

which of the following should not be included in the correct level for an HC measurement? a. falx cerebri b. fourth ventricle c. thalamus d. CSP

b. fourth ventricle

which of the following would not be normally located within the midline of the fetal brain? a. CSP b. lobes of the thalamus c. third ventricle d. falx cerebri

b. lobes of the thalamus

absence of the skull is:

c. acrania

the third ventricle is located: a. anterior to the thalamus b. anterior to the cerebellar vermis c. between the two lobes of the thalamus d. superior to the corpus callosum

c. between the two lobes of the thalamus

all of the following are sonographic features of alobar holoprosencephaly except: a. cyclopia b. monoventricle c. dorsal cyst d. fused thalamus

c. dorsal cyst

which of the following is located on both sides of the midline? a. interhemispheric fissures b. third and fourth ventricles c. lateral ventricles d. third ventricle and cerebral aqueduct

c. lateral ventricles

a cisterna magna that measures 15mm and a normal appearing cerebellum is most likely:

c. mega cisterna magna

a normal shaped skull is termed:

c. mesocephaly

the third ventricle communicates with the fourth ventricle at the:

d. aqueduct of Sylvius

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

!!! a. cerebellar vermis

with what structure does the posterior fossa cyst associated with DWM (Dandy-Walker Malformation) communicate?

!!! a. fourth ventricle

the interthalamic adhesion (massa intermedia) passes through the:

!!! a. third ventricle

dangling choroid sign is associated with:

!!! a. ventriculormegaly

which of the following will also typically be absent with agenesis of the corpus callosum? a. cerebellar vermis b. CSP c. third ventricle d. fourth ventricle

!!! b. CSP

all of the following are sonographic findings of Arnold-Chiari II malformation except: a. enlarged massa intermedia b. hydrocephalus c. obliteration of the cisterna magna d. strawberry sign

!!! d. strawberry sign

the choroid plexus cyst could be associated with an increased risk of:

!!! d. trisomy 18

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

!!!. d. porencephaly

a cloverleaf-shaped skull is related to:

!!!. d. thanatophoric dysplasia

the most accurate measurement for estimating gestational age is:

a. BPD

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

a. CSP

a lemon-shaped skull is related to:

b. Arnold-Chiari II malformation

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

b. agenesis of the corpus callosum

what chromosomal aberration is most often associated with holoprosencephaly?

c. trisomy 13

a strawberry-shaped skull is commonly associated with:

c. trisomy 18

the cisterna magna should not exceed ______ in the transcerebellar plane

d. 10mm

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

!!! b. hydranencephaly

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

!!! b. lissencephaly

the fourth ventricle is located:

!!! c. anterior to the cerebellar vermis

enlargement of the frontal horns and narrowing of the occipital horns is termed:

!!! c. colpocephaly

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

!!! c. colpocephaly

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

!!! c. schizencephaly

what fetal suture is located within the frontal bone along the midline of the forehead?

!!! d. metopic suture

what cerebral malformation is as a result of agenesis or hypoplasia of the cerebellar vermis?

!!! d. DWM

which of the following is a genetic disorder that includes craniosynostosis, midline facial hypoplasia, and syndactyly?

!!! d. apert syndrome

the most common cause of hydrocephalus in utero is?

!!! d. aqueductal stenosis

the double fold of dura mater that divides the cerebral hemispheres is the:

!!! d. falx cerebri

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

!!! d. holoprosencephaly