The Fetal Head and Brain
the development of fluid filled clefts within the cerebrum is consistent with
schizencephaly
the MC cause of hydrocephalus in utero
aqueductal stenosis
the lack of sulci within the fetal cranium is a reliable indicatior of
lissencephaly
what would be the most likely findings with TORCH infections
intracranial calcifications
all of the following are sonographic findings of Arnold Chiari II Malformation except: enlarged massa intermedia hydrocephalus obliteration of CM Strawberry sign
strawberry sign
dangling choroid sign is associated with
ventriculomegaly
the interthalamic adhesion (massa intermedia) passes through the
3rd ventricle
which should not be included in a head measurement: falx 4th ventricle thalamus csp
4th ventricle
a lemon shaped skull is related to
arnold chiari II malformation
the structure located between the two lobes of the cerebellum
cerebellar vermis
enlargement of the frontal horns and narrowing of the occipital horns is termed
colpocephaly
The band of tissue that allows communication between the right and left cerebral hemispheres is the:
corpus callosum
the sonographic findings of a fluid filled cranium with absence of cerebral tissue is consistent with
hydranencephaly
following an intracranial hemorrhage, a cyst is noted within the cerebrum that communicates with the lateral ventricles
porencephaly
a cloverleaf skull is related to
thanatophoric dysplasia
what chromosomal aberration is ML associated with holoprosencephaly
trisomy 13
a strawberry shaped skull is commonly associated with
trisomy 18
the choroid plexus cyst could be associated with an increase risk for:
trisomy 18
the "sunburst" of the cerebral sulci is a sonographic finding of
agenesis of the corpus callosum
the most severe form of holoprosencephaly is
alobar
the fourth ventricle is located
anterior to the cerebellar vermis
the 3rd ventricle communicates with the 4th ventricle via the
aqueduct of sylvius
the cisterna magna should not exceed ___mm in the transcerebellar plane
10
what is a genetic disorder that includes craniosynostosis, midline facial hypoplasia, and syndactyly?
Apert syndrome
absence of the skull
acrania
the third ventricle is located
between the two lobes of the thalamus
what cerebral malformation is as a result of agenesis/hypoplasia of the cerebellar vermis
dandy walker malformation
all of the following are sonographic features of holoprosencephaly except: cyclopia monoventricle dorsal cyst fused thalamus
dorsal cyst
which of the following is located on both sides of the midline: interhemispheric fissure 3rd and 4th ventricles lateral ventricles 3rd ventricle and cerebral aqueduct
lateral ventricles
the double fold of dura mater that divides the cerebral hemispheres is the
falx cerebri
What structure does the posterior fossa cyst associated with DWM communicate?
fourth ventricle
most accurate measurement for estimating gestational age (head measurment)
head circumference (HC)
what cerebral abnormality are atypical facial features commonly associated with
holoprosencephaly
the anechoic midline structure located between the frontal horns of the lateral ventricles
CSP
what will also typically be absent with agenesis of the corpus callosum?
CSP
which of the following would not normally be located midline: CSP lobes of thalamus 3rd ventricle falx cerebri
lobes of thalamus
a CM that measures 15mm and a normal appearing cerebellum is most likely
mega cisterna magna
a normal shaped skull is termed
mesocephaly
what fetal suture is located within the frontal bone along the midline of the forehead
metopic suture