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: