The Fetal Head and Brain

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the development of fluid filled clefts within the cerebrum is consistent with

schizencephaly

the MC cause of hydrocephalus in utero

aqueductal stenosis

the lack of sulci within the fetal cranium is a reliable indicatior of

lissencephaly

what would be the most likely findings with TORCH infections

intracranial calcifications

all of the following are sonographic findings of Arnold Chiari II Malformation except: enlarged massa intermedia hydrocephalus obliteration of CM Strawberry sign

strawberry sign

dangling choroid sign is associated with

ventriculomegaly

the interthalamic adhesion (massa intermedia) passes through the

3rd ventricle

which should not be included in a head measurement: falx 4th ventricle thalamus csp

4th ventricle

a lemon shaped skull is related to

arnold chiari II malformation

the structure located between the two lobes of the cerebellum

cerebellar vermis

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

colpocephaly

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

corpus callosum

the sonographic findings of a fluid filled cranium with absence of cerebral tissue is consistent with

hydranencephaly

following an intracranial hemorrhage, a cyst is noted within the cerebrum that communicates with the lateral ventricles

porencephaly

a cloverleaf skull is related to

thanatophoric dysplasia

what chromosomal aberration is ML associated with holoprosencephaly

trisomy 13

a strawberry shaped skull is commonly associated with

trisomy 18

the choroid plexus cyst could be associated with an increase risk for:

trisomy 18

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

agenesis of the corpus callosum

the most severe form of holoprosencephaly is

alobar

the fourth ventricle is located

anterior to the cerebellar vermis

the 3rd ventricle communicates with the 4th ventricle via the

aqueduct of sylvius

the cisterna magna should not exceed ___mm in the transcerebellar plane

10

what is a genetic disorder that includes craniosynostosis, midline facial hypoplasia, and syndactyly?

Apert syndrome

absence of the skull

acrania

the third ventricle is located

between the two lobes of the thalamus

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

dandy walker malformation

all of the following are sonographic features of holoprosencephaly except: cyclopia monoventricle dorsal cyst fused thalamus

dorsal cyst

which of the following is located on both sides of the midline: interhemispheric fissure 3rd and 4th ventricles lateral ventricles 3rd ventricle and cerebral aqueduct

lateral ventricles

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

falx cerebri

What structure does the posterior fossa cyst associated with DWM communicate?

fourth ventricle

most accurate measurement for estimating gestational age (head measurment)

head circumference (HC)

what cerebral abnormality are atypical facial features commonly associated with

holoprosencephaly

the anechoic midline structure located between the frontal horns of the lateral ventricles

CSP

what will also typically be absent with agenesis of the corpus callosum?

CSP

which of the following would not normally be located midline: CSP lobes of thalamus 3rd ventricle falx cerebri

lobes of thalamus

a CM that measures 15mm and a normal appearing cerebellum is most likely

mega cisterna magna

a normal shaped skull is termed

mesocephaly

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

metopic suture


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