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