Penny OB/GYN Ch.24 Review

The "sunburst" of the cerebral sulk is a sonographic finding of:

Agenesis of the corpus callosum

The most server form of holoprosencephaly is:

Alobar

The fourth ventricle is located:

Anterior to the cerebellar vermis

The most common cause of hydrocephalus in utero is:

Aqueductal stenosis

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

Copocephaly

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

Falx cerebri

The most accurate measurement at estimating gestational age from the list below is:

Head circumference

The cisterna magna should not exceed what measurement in the transcerebellar plane?

10 mm

The third ventricle communicates with the fourth ventricle at the:

Aqueduct of Sylvius

The third ventricle is located:

Between the two lobes of the thalamus

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

Cavum septum pellucidum

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

Cerebellar vermis

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

Corpus callosum

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

Dandy-Walker Malformation

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

Dandy-Walker Malformation

All of the following are sonographic features of alobar holoprosencephaly except:

Dorsal cyst

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

Holoprosencephaly

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

Hydrancephaly

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

Lissencephaly

All of the following are midline brain structures except:

Lobes of the thalamus

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

Porencephaly

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

Schizencephaly

A lemon-shaped skull is related to:

Spina bifida, Arnold-Chiari 2 malformation, and thanatophoric dysplasia

All of the following are sonographic findings of Arnold-Chiari 2 malformation except:

Strawberry sign

A cloverleaf-shaped skull is related to:

Thanatophoric dysplasia

The interthalmic adhesion (massa intermedia) passes through the:

Third ventricle

What chromosomal aberration is most often 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 of:

Trisomy 18

The dangling choroid sign is synonymous with:

Ventriculomegaly