Penny : CH 24 Fetal Head and Brain
The cisterna magna should not exceed _____ in the transcerebellar plane. a. 4 mm b. 2 mm c. 8 mm d. 10 mm
d. 10 mm
The anechoic midline brain structure located between the frontal horns of the lateral ventricles is the: a. Cavum septum pellucidum b. Cavum vergae c. Corpus callosum d. Fourth ventricle
a. Cavum septum pellucidum
The structure located between the two lobes of the cerebellum is the: a. Cerebellar vermis b. Cerebellar tonsils c. Falx cerebri d. Corpus callosum
a. Cerebellar vermis
The interthalamic adhesion (massa intermedia) passes through the: a. Third ventricle b. Fourth ventricle c. Cisterna magna d. Cavum septum pellucidum
a. Third ventricle
The "sunburst" of the cerebral sulci is a sonographic finding of: a. Dandy-Walker malformation b. Agenesis of the corpus callosum c. Colpocephaly d. Hydranencephaly
b. Agenesis of the corpus callosum
The most severe form of holoprosencephaly is: a. Lobar b. Alobar c. Semilobar d. Lobular
b. Alobar
The band of tissue that allows communication between the right and left cerebral hemispheres is the: a. Falx cerebri b. Corpus callosum c. Cerebellar vermis d. Cavum septum pellucidum
b. Corpus callosum
The sonographic finding of a fluid-filled cranium with absence of cerebral tissue is consistent with: a. Hydrocephalus b. Hydranencephaly c. Holoprosencephaly d. Schizencephaly
b. Hydranencephaly
The fourth ventricle is located: a. Posterior to the cavum septum pellucidum b. Between the frontal horns of the lateral ventricles c. Anterior to the cerebellar vermis d. Medial to the third ventricle
c. Anterior to the cerebellar vermis
All of the following are sonographic features of alobar holoprosencephaly except: a. Cyclopia b. Monoventricle c. Dorsal cyst d. Fused thalamus
c. Dorsal cyst
The third ventricle communicates with the fourth ventricle at the: a. Foramen of Magendie b. Foramen of Luschka c. Foramen of Monro d. Aqueduct of Sylvius
d. Aqueduct of Sylvius
The most common cause of hydrocephalus in utero is: a. Cerebral hemorrhage b. Holoprosencephaly c. Brain tumors d. Aqueductal stenosis
d. Aqueductal stenosis
A lemon-shaped skull is related to: a. Spina bifida b. Arnold-Chiari II malformation c. Thanatophoric dysplasia d. Both A and B e. All of the above
d. Both A and B
Agenesis or hypoplasia of the cerebellar vermis results in what cerebral malformation? a. Arnold-Chiari II malformation b. Schizencephaly c. Mega cisterna magna d. Dandy-Walker malformation
d. Dandy-Walker malformation
Elevation of the tentorium and an enlarged cisterna magna that communicates with a dilated fourth ventricle is consistent with: a. Arnold-Chiari II malformation b. Schizencephaly c. Mega cisterna magna d. Dandy-Walker malformation
d. Dandy-Walker malformation
The double fold of dura mater used to divide the cerebral hemispheres is the: a. Cerebellum b. Cavum septum pellucidum c. Corpus callosum d. Falx cerebri
d. Falx cerebri
All of the following are sonographic findings of Arnold-Chiari II malformation except: a. Enlarged massa intermedia b. Hydrocephalus c. Obliteration of the cisterna magna d. Strawberry sign
d. Strawberry sign
A cloverleaf-shaped skull is related to: a. Trisomy 18 b. Meckel-Gruber syndrome c. Trisomy 13 d. Thanatophoric dysplasia
d. Thanatophoric dysplasia
The choroid plexus cyst could be associated with an increase risk of: a. Trisomy 13 b. Trisomy 4 c. Arnold-Chiari II malformation d. Trisomy 18
d. Trisomy 18
The dangling choroid sign is synonymous with: a. Hydranencephaly b. Schizencephaly c. Acrania d. Ventriculomegaly
d. Ventriculomegaly
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
b. Head circumference
The lack of sulci within the fetal cerebrum is a reliable indicator of: a. Agenesis of the corpus callosum b. Lissencephaly c. Schizencephaly d. Porencephaly
b. Lissencephaly
The third ventricle is located: a. Anterior to the thalamus b. Anterior to the cerebellar vermis c. Between the two lobes of the thalamus d. Superior to the corpus callosum
c. Between the two lobes of the thalamus
The condition in which the frontal horns are small and the occipital horns are enlarged is referred to as: a. Ethmocephaly b. Hydrocephalus c. Colpocephaly d. Encephalitis
c. Colpocephaly
All of the following are midline brain structures except: a. Interhemispheric fissure b. Cavum septum pellucidum c. Lobes of the thalamus d. Third ventricle
c. Lobes of the thalamus
Atypical facial features are most commonly associated with what cerebral abnormality listed? a. Dandy-Walker malformation b. Schizencephaly c. Lissencephaly d. Holoprosencephaly
d. Holoprosencephaly
Following an intracranial hemorrhage, a cyst is noted within the cerebrum that communicates with the lateral ventricle. This is referred to as: a. Schizencephaly b. Lissencephaly c. Holoprosencephaly d. Porencephaly
d. Porencephaly
The development of fluid-filled cleft within the cerebrum is consistent with: a. Holoprosencephaly b. Lissencephaly c. Schizencephaly d. Hydranencephaly
c. Schizencephaly
What chromosomal aberration is most often associated with holoprosencephaly? a. Anophthalmia b. Trisomy 21 c. Trisomy 13 d. Trisomy 18
c. Trisomy 13
A strawberry-shaped skull is commonly associated with: a. Trisomy 21 b. Trisomy 15 c. Trisomy 18 d. Trisomy 13
c. Trisomy 18