Ch. 24 The Fetal Head and Brain Flashcards
The choroid plexus cyst could be associated w/ an increase risk of: Trisomy 13 Trisomy 4 Arnold-Chiari II malformation Trisomy 18
Trisomy 18
All of the following are sonographic findings of Arnold-Chiari II malformation except:
- Enlarged massa intermedia
- Hydrocephalus
- Obliteration of the cisterna magna
- Strawberry sign
Strawberry sign
All of the following are midline brain structures except:
- Interhemispheric fissure
- Cavum septum pellucidum
- Lobes of the thalamus
- Third ventricle
Lobes of the thalamus
The double fold of dura mater used to divide the cerebral hemispheres is the:
- Cerebellum
- Cavum septum pellucidum
- Corpus callosum
- Falx cerebri
Falx cerebri
The development of fluid-filled cleft w/in the cerebrum is consistent with: Holoprosencephaly Lissencephaly Schizencephaly Hydranencephaly
Schizencephaly
The anechoic midline brain structure located b/n the frontal horns of the lateral ventricles is the:
- Cavum septum pellucidum
- Cavum vergae
- Corpus callosum
- Fourth ventricle
Cavum septum pellucidum
The “sunburst” of the cerebral sulci is a sonographic finding of:
- Dandy-Walker malformation
- Agenesis of the corpus callosum
- Colpocephaly
- Hydranencephaly
Agenesis of the corpus callosum
The interthalamic adhesion (massa intermedia) passes through the: 3rd ventricle 4th ventricle Cisterna magna Cavum septum pellucidum
3rd ventricle
The most severe form of holoprosencephaly is: Lobar Alobar Semilobar Lobular
Alobar
The 3rd ventricle is located:
- Anterior to the thalamus
- Anterior to the cerebellar vermis
- B/n the two lobes of the thalamus
- Superior to the corpus callosum
B/n the two lobes of the thalamus
What chromosomal aberration is most often associated w/ holoprosencephaly? Anophthalmia Trisomy 21 Trisomy 13 Trisomy 18
Trisomy 13
The 3rd ventricle communicates w/ the 4th ventricle at the:
- Foramen of Magendie
- Foramen of Luschka
- Foramen of Monro
- Aqueduct of Sylvius
Aqueduct of Sylvius
The 4th ventricle is located:
- Posterior to the cavum septum pellucidum
- B/n the frontal horns of the lateral ventricles
- Anterior to the cerebellar vermis
- Medial to the 3rd ventricle
Anterior to the cerebeller vermis
The structure located b/n the two lobes of the cerebellum is the: Cerebellar vermis Cerebellar tonsils Falx cerebri Corpus callosum
Cerebellar vermis
The most accurate measurement at estimating gestational age from the below list is:
- Biparietal diameter
- Head circumference
- Transcerebellar measurement
- Lateral ventricle
Head circumference
The cisterna magna should not exceed \_\_\_\_\_\_\_\_ in the transcerebellar plane. 4mm 2mm 8mm 10mm
10mm
A strawberry-shaped skull is commonly associated w/: Trisomy 21 Trisomy 15 Trisomy 18 Trisomy 13
Trisomy 18
The band of tissue that allows communication b/n the right and left cerebral hemispheres is the: Falx cerebri Corpus callosum Cerebellar vermis Cavum septum pellucidum
Corpus callosum
A cloverleaf-shaped skull is related to:
- Trisomy 18
- Meckel-Gruber syndrome
- Trisomy 13
- Thanatophoric dysplasia
Thanatophoric dysplasia
A lemon-shaped skull is related to:
- Spina bifida
- Arnold-Chiari II malformation
- Thanatophoric dysplasia
- Both spina bifida and Arnold-Chiari malf.
- All of the above
Both spina bifida and Arnold-Chiari malformation
All of the following are sonographic features of alobar holoprosencephaly except: Cyclopia Monoventricle Dorsal cyst Fused thalamus
Dorsal cyst
Atypical facial features are most commonly associated w/ what cerebral abnormality listed?
- Dandy-Walker malformation
- Schizencephaly
- Lissencephaly
- Holoprosencephaly
Holoprosencephaly
The dangling choroid sign is synonymous w/: Hydranencephaly Schizencephaly Acrania Ventriculomegaly
Ventriculomegaly
The most common cause of hydrocephalus in utero is: Cerebral hemorrhage Holoprosencephaly Brain tumors Aqueductal stenosis
Aqueductal stenosis
The sonographic finding of a fluid-filled cranium w/ absence of cerebral tissue is consistent w/: Hydrocephalus Hydranencephaly Holoprosencephaly Schizencephaly
Hydranencephaly
The lack of sulci w/in the fetal cerebrum is a reliable indicator of:
- Agenesis of the corpus callosum
- Lissencephaly
- Schizencephaly
- Porencephaly
Lissencephaly
Elevation of the tentorium and an enlarged cisterna magna that communicates w/ a dilated 4th ventricle is consistent w/:
- Arnold-Chiari II malformation
- Schizencephaly
- Mega cisterna magna
- Dandy-Walker malformation
Dandy-Walker malformation
Agenesis of hypoplasia of the cerebellar vermis results in what cerebral malformation?
- Arnold-Chiari II malformation
- Schizencephaly
- Mega cisterna magna
- Dandy-Walker malformation
Dandy-Walker malformation
The condition in which the frontal horns are small and the occipital horns are enlarged is referred to as: Ethmocephaly Hydrocephalus Copocephaly Encephalitis
Colpocephaly
Following an intracranial hemorrhage, a cyst is noted w/in the cerebrum that communicates w/ the lateral ventricle. This is referred to as: Schizencephaly Lissencephaly Holoprosencephaly Porencephaly
Porencephaly
