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