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SEMINAR FOR OB/GYN > Ch. 24 The Fetal Head and Brain > Flashcards

Ch. 24 The Fetal Head and Brain Flashcards

1
Q 
The choroid plexus cyst could be associated w/ an increase risk of:
Trisomy 13
Trisomy 4
Arnold-Chiari II malformation
Trisomy 18
A

Trisomy 18

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2
Q

All of the following are sonographic findings of Arnold-Chiari II malformation except:

  • Enlarged massa intermedia
  • Hydrocephalus
  • Obliteration of the cisterna magna
  • Strawberry sign
A

Strawberry sign

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3
Q

All of the following are midline brain structures except:

  • Interhemispheric fissure
  • Cavum septum pellucidum
  • Lobes of the thalamus
  • Third ventricle
A

Lobes of the thalamus

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4
Q

The double fold of dura mater used to divide the cerebral hemispheres is the:

  • Cerebellum
  • Cavum septum pellucidum
  • Corpus callosum
  • Falx cerebri
A

Falx cerebri

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5
Q 
The development of fluid-filled cleft w/in the cerebrum is consistent with:
Holoprosencephaly
Lissencephaly
Schizencephaly
Hydranencephaly
A

Schizencephaly

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6
Q

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
A

Cavum septum pellucidum

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7
Q

The “sunburst” of the cerebral sulci is a sonographic finding of:

  • Dandy-Walker malformation
  • Agenesis of the corpus callosum
  • Colpocephaly
  • Hydranencephaly
A

Agenesis of the corpus callosum

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8
Q 
The interthalamic adhesion (massa intermedia) passes through the:
3rd ventricle
4th ventricle
Cisterna magna
Cavum septum pellucidum
A

3rd ventricle

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9
Q 
The most severe form of holoprosencephaly is:
Lobar
Alobar
Semilobar
Lobular
A

Alobar

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10
Q

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
A

B/n the two lobes of the thalamus

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11
Q 
What chromosomal aberration is most often associated w/ holoprosencephaly?
Anophthalmia
Trisomy 21
Trisomy 13
Trisomy 18
A

Trisomy 13

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12
Q

The 3rd ventricle communicates w/ the 4th ventricle at the:

  • Foramen of Magendie
  • Foramen of Luschka
  • Foramen of Monro
  • Aqueduct of Sylvius
A

Aqueduct of Sylvius

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13
Q

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
A

Anterior to the cerebeller vermis

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14
Q 
The structure located b/n the two lobes of the cerebellum is the:
Cerebellar vermis
Cerebellar tonsils
Falx cerebri
Corpus callosum
A

Cerebellar vermis

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15
Q

The most accurate measurement at estimating gestational age from the below list is:

  • Biparietal diameter
  • Head circumference
  • Transcerebellar measurement
  • Lateral ventricle
A

Head circumference

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16
Q 
The cisterna magna should not exceed \_\_\_\_\_\_\_\_ in the transcerebellar plane.
4mm
2mm
8mm
10mm
A

10mm

17
Q 
A strawberry-shaped skull is commonly associated w/:
Trisomy 21
Trisomy 15
Trisomy 18
Trisomy 13
A

Trisomy 18

18
Q 
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
A

Corpus callosum

19
Q

A cloverleaf-shaped skull is related to:

  • Trisomy 18
  • Meckel-Gruber syndrome
  • Trisomy 13
  • Thanatophoric dysplasia
A

Thanatophoric dysplasia

20
Q

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
A

Both spina bifida and Arnold-Chiari malformation

21
Q 
All of the following are sonographic features of alobar holoprosencephaly except:
Cyclopia
Monoventricle
Dorsal cyst
Fused thalamus
A

Dorsal cyst

22
Q

Atypical facial features are most commonly associated w/ what cerebral abnormality listed?

  • Dandy-Walker malformation
  • Schizencephaly
  • Lissencephaly
  • Holoprosencephaly
A

Holoprosencephaly

23
Q 
The dangling choroid sign is synonymous w/:
Hydranencephaly
Schizencephaly
Acrania
Ventriculomegaly
A

Ventriculomegaly

24
Q 
The most common cause of hydrocephalus in utero is:
Cerebral hemorrhage
Holoprosencephaly
Brain tumors
Aqueductal stenosis
A

Aqueductal stenosis

25
Q 
The sonographic finding of a fluid-filled cranium w/ absence of cerebral tissue is consistent w/:
Hydrocephalus
Hydranencephaly
Holoprosencephaly
Schizencephaly
A

Hydranencephaly

26
Q

The lack of sulci w/in the fetal cerebrum is a reliable indicator of:

  • Agenesis of the corpus callosum
  • Lissencephaly
  • Schizencephaly
  • Porencephaly
A

Lissencephaly

27
Q

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
A

Dandy-Walker malformation

28
Q

Agenesis of hypoplasia of the cerebellar vermis results in what cerebral malformation?

  • Arnold-Chiari II malformation
  • Schizencephaly
  • Mega cisterna magna
  • Dandy-Walker malformation
A

Dandy-Walker malformation

29
Q 
The condition in which the frontal horns are small and the occipital horns are enlarged is referred to as:
Ethmocephaly
Hydrocephalus
Copocephaly
Encephalitis
A

Colpocephaly

30
Q 
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
A

Porencephaly

SEMINAR FOR OB/GYN (18 decks)

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