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OBGYN REGISTRY PRACTICE > The Fetal Head & Brain > Flashcards

The Fetal Head & Brain Flashcards

1
Q

With what structure does the posterior fossa cyst associated with DWM
communicate?
A. Fourth ventricle
B. Third ventricle
C. Cerebellar vermis
D. Cerebral aqueduct

A

A. Fourth ventricle

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2
Q

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

A

D. Trisomy 18

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3
Q

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

A

D. Strawberry sign

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4
Q

Which of the following is located on both sides of the midline?
A. Interhemispheric fissures
B. Third and fourth ventricles
C. Lateral ventricles
D. Third ventricle and cerebral aqueduct

A

C. Lateral ventricles

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5
Q

Which of the following will also typically be absent with agenesis of the
corpus callosum?
A. Cerebellar vermis
B. CSP
C. Third ventricle
D. Fourth ventricle

A

B. CSP

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6
Q

The double fold of dura mater that divides the cerebral hemispheres is
the:
A. Cerebellum
B. CSP
C. Corpus callosum
D. Falx cerebri

A

D. Falx cerebri

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7
Q

The development of fluid-filled cleft within the cerebrum is consistent
with:
A. Holoprosencephaly
B. Lissencephaly
C. Schizencephaly
D. Hydranencephaly

A

C. Schizencephaly

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8
Q

The anechoic midline brain structure located between the frontal horns of
the lateral ventricles is the:
A. CSP
B. Cavum vergae
C. Corpus callosum
D. Fourth ventricle

A

A. CSP

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9
Q

The “sunburst” of the cerebral sulci is a sonographic finding of:
A .DWM
B. Agenesis of the corpus callosum
C. Colpocephaly
D. Hydranencephaly

A

B. Agenesis of the corpus callosum

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10
Q

Enlargement of the frontal horns and narrowing of the occipital horns is
termed:
A. Holoprosencephaly
B. DWM
C. Colpocephaly
D. Apert syndrome

A

C. Colpocephaly

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11
Q

The interthalamic adhesion (massa intermedia) passes through the:
A. Third ventricle
B. Fourth ventricle
C. Cisterna magna
D. CSP

A

A. Third ventricle

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12
Q

The most severe form of holoprosencephaly is:
A. Lobar
B. Alobar
C. Semilobar
D. Lobular

A

B. Alobar

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13
Q

Which of the following is a genetic disorder that includes
craniosynostosis, midline facial hypoplasia, and syndactyly?
A. Lobar holoprosencephaly
B. Beckwith–Wiedemann syndrome
C. Arnold–Chiari II malformation
D. Apert syndrome

A

D. Apert syndrome

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14
Q

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

A

C. Between the two lobes of the thalamus

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15
Q

What chromosomal aberration is most often associated with
holoprosencephaly?
A. Anophthalmia
B. Trisomy 21
C. Trisomy 13
D. Trisomy 18

A

C. Trisomy 13

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16
Q

Dangling choroid sign is associated with:
A. Ventriculomegaly
B. Hydranencaphaly
C. Lissencephaly
D. Meckel–Gruber syndro

A

A. Ventriculomegaly

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17
Q

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

A

D. Aqueduct of Sylvius

18
Q

The fourth ventricle is located:
A. Posterior to the CSP
B. Between the frontal horns of the lateral ventricles
C. Anterior to the cerebellar vermis
D. Medial to the third ventricle

A

C. Anterior to the cerebellar vermis

19
Q

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

A. Cerebellar vermis

20
Q

A normal shaped skull is termed:
A. Dolichocephaly
B. Brachycephaly
C. Mesocephaly
D. Scaphocephaly

A

C. Mesocephaly

21
Q

The most accurate measurement for estimating gestational age is:
A. BPD
B. HC
C. Transcerebellar measurement
D. Lateral ventricle

A

B. HC

22
Q

The cisterna magna should not exceed ____ in the transcerebellar plane.
A. 4 mm
B. 2 mm
C. 8 mm
D. 10 mm

A

D. 10 mm

23
Q

A strawberry-shaped skull is commonly associated with:
A. Trisomy 21
B. Trisomy 15
C. Trisomy 18
D. Trisomy 13

A

C. Trisomy 18

24
Q

Which of the following would be the most likely fetal cranial findings
with TORCH infections?
A. Intracranial calcification
B. Cerebral atrophy
C. Porencephaly
D. Scaphocephaly

A

A. Intracranial calcification

25
Q

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. CSP

A

B. Corpus callosum

26
Q

A cloverleaf-shaped skull is related to:
A. Trisomy 18
B. Meckel–Gruber syndrome
C. Trisomy 13
D. Thanatophoric dysplasia

A

D. Thanatophoric dysplasia

27
Q

A lemon-shaped skull is related to:
A. Trisomy 2
B. Arnold–Chiari II malformation
C. Thanatophoric dysplasia
D. Beckwith–Wiedemann syndrome

A

B. Arnold–Chiari II malformation

28
Q

All of the following are sonographic features of alobar holoprosencephaly except:
A. Cyclopia
B. Monoventricle
C. Dorsal cyst
D. Fused thalamus

A

C. Dorsal cyst

29
Q

What cerebral abnormality are atypical facial features most commonly
associated with?
A. DWM
B. Schizencephaly
C. Lissencephaly
D. Holoprosencephaly

A

D. Holoprosencephaly

30
Q

Absence of the skull is:
A. Hydranencephaly
B. Schizencephaly
C. Acrania
D. Ventriculomegaly

A

C. Acrania

31
Q

What fetal suture is located within the frontal bone along the midline of
the forehead?
A. Squamosal suture
B. Sagittal suture
C. Lambdoidal suture
D. Metopic suture

A

D. Metopic suture

32
Q

The most common cause of hydrocephalus in utero is:
A. Cerebral hemorrhage
B. Holoprosencephaly
C. Brain tumors
D. Aqueductal stenosis

A

D. Aqueductal stenosis

33
Q

The sonographic finding of a fluid-filled cranium with absence of
cerebral tissue is consistent with:
A. Hydrocephalus
B. Hydranencephaly
C. Holoprosencephaly
D. Schizencephaly

A

B. Hydranencephaly

34
Q

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

A

B. Lissencephaly

35
Q

A cisterna magna that measure 15 mm and a normal appearing
cerebellum is most likely:
A. Arnold–Chiari II malformation
B. Schizencephaly
C. Mega cisterna magna
D. DWM

A

C. Mega cisterna magna

36
Q

What cerebral malformation is as a result of agenesis or hypoplasia of the
cerebellar vermis?
A. Arnold–Chiari II malformation
B. Schizencephaly
C. Mega cisterna magna
D. DWM

A

D. DWM

37
Q

Which of the following would not be normally located within the midline
of the fetal brain?
A. CSP
B. Lobes of the thalamus
C. Third ventricle
D. Falx cerebri

A

B. Lobes of the thalamus

38
Q

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

A

C. Colpocephaly

39
Q

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

A

D. Porencephaly

40
Q

Which of the following should not be included in the correct level for an
HC measurement?
A. Falx cerebri
B. Fourth ventricle
C. Thalamus
D. CSP

A

B. Fourth ventricle

OBGYN REGISTRY PRACTICE (17 decks)

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