Penny Ch.24

Dandy-walker malformation

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

Corpus callosum

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

Trisomy 18

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

10mm

The cisterna magna should not exceed ______ in the transcerebellar plane.

Schizencephaly

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

Falx cerebri

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

Third ventricle

The interthalamic adhesion (massa intermedia) passes through the:

Lobes of the thalamus

All of the following are midline brain structures except:

Anterior to the cerebellar vermis

The fourth ventricle is located:

Lissencephaly

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

Colpocephaly

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

Venrticulomegaly

The danglining choroid sign is synonymous with:

Thanatophoric dysplasia

A cloverleaf-shaped skull is related to:

Spina bifida and Arnold-Chiari II malformation

A lemon-shaped skull is related to:

Trisomy 18

A strawberry-shaped skull is commonly associated with:

Agenesis of the corpus callosum

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

Cavum septum pellucidum

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

Head circumference

The most accurate measurement at estimating gestational age from the below list is: a. Biparietal diameter b. Head circumference c. Transcerebellar measurement d. Lateral ventricle

Aqueductal stenosis

The most common cause of hydrocephalus in utero is:

Alobar

The most severe form of holoprosencephaly is:

Between the two lobes of the thalamus

The third ventricle is located:

Trisomy 13

What chromosomal aberrations most often associated with holoprosencephaly?

Strawberry Sign

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

Holoprosoncephaly

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

Porencaphaly

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

Dandy-walker malformation

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

Cerebellar vermis

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

Aqueduct of Syluius

The third ventricle communicate with the fourth ventricle at the:

Hydranencephaly

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

Dorsal cyst

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