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OB: Pathology Worksheet Review Part 2
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Terms in this set (71)
choroid plexus cyst
regressed by 28 weeks, normal typically
Cavum velum interpositum
midline cystic collection
cavum velum interpositum sono
cyst posterior to corpus callosum
cavum velum interpositum use color to rule out _____
aneurysm
ventriculomegaly sono
> 10 mm vent, dangling choroids
Mild ventriculomegaly
10-12 mm
Moderate ventriculomegaly
12-15 mm
Severe ventriculomegaly
> 15 mm
Hydrocephalus
ventriculomegaly w/ increased pressure
hydrocephalus sono
> 10 mm vent, w/ or w/o head enlargement
communicating hydrocephalus
all ventricles dilated
non-communicating hydrocephalus
dilation depending on area blocked, most common
neural tube defects, ____ ____ reduced
folic acid
Anencephaly
lack of everything above the eyes (brain & bones)
anencephaly lab value
increased AFP
anencephaly sono
frog eyes, everything above eyes missing
anencephaly is associated with
increased fetal activity & polyhydramnios
acrania
absent of cranial vault but brain tissue present
acrania lab value
increased AFP
acrania sono
lack of head bones; mohawk due to floating brain tissue
encephaloceles/cephaloceles
cranial defect w/ sac filled w/ brain contents
encephaloceles/cephaloceles most common:
occipital
encephaloceles/cephaloceles is associated with
hydrocephalus
chiari malformations
downward displacement of he posterior fossa
chiari malformations lab value
increased AFP
chiari 1
downward displacement, normal 4th, hard to dx
chiari II
myelomeningocele, banana (cerebellum), ventriculomegaly, lemon shaped head, no: 4th, CM, or corpus callosum
what form of chiari is the most common
chiari II
what form of chiari is the worst one?
chiari III
chiari III
cervical encephalocele w/ posterior fossa inside
amniotic band syndrome
amnion detaches from chorion & attaches to baby
corpus callosum agenesis
failure to develop
corpus callosum agenesis sono
absent CSP, sunburst, appearance of sulci
Dandy Walker
absent cerebellum vermis
Dandy Walker sono
splayed cerebellum w/ 4th vent in contact with CM (large CM, make sure you're not scanning too low)
Holoprosencephaly
fusion disorder, absent falx, & corpus callosum
Holoprosencephaly: Septo-optic dysplasia
absent CSP, no facial abnormalities
Holoprosencephaly: lobar
fused lateral vent, some brain tissue, none or little facial abnormalities
Holoprosencephaly: semi-lobar
less brain tissue, fused thalami, cleft lip/palate
Holoprosencephaly: alobar
very little brain tissue, fused ventricles filling most of head, big facial abnormalities like cyclopia, probiscis
worst form of Holoprosencephaly
alobar
schizencephaly
fluid filled clefts extending through brain
schizencephaly sono
fluid (anechoic) coming from ventricle & through cortex
Schizencephaly is associated with
drug abuse
lissencephaly
smooth brain
lissencephaly sono
no sulci
when can you diagnose lissencephaly?
late gestation or after birth
hydranencephaly
thought to be bc of bilat ICA occlusion
hydranencephaly sono
flax present, fluid-filled calvarium w/ normal thalami, cerebellum, & brainstem
porencephalic cyst
any cystic area in brain can be called this. can be due to brain tissue breaking down & brain walling off the resolving hematoma
porencephalic cyst sono
cyst in brain that connects to ventricles
vein of galen aneurysm sono
cyst posterior to thalami w/ lots of flow
in the vein of galen aneurysm operable?
no
spina bifida
grouping of disorders. name depends on what is in defect
spina bifida lab value
most have increased AFP & ACHE
spina bifida sono: SAG
defect posterior to sacrum
spina bifida sono: Trans
splaying or V shaped bodies
spina bifida sono: coronal
widening of spinal processes
spina bifida other info:
myelomenengocele is almost always associated w/ chiari II (banana cerebellum & lemon shaped head)
scoliosis / kyphosis
abnormal curvature of the spine
scoliosis
coronal view: side to side
kyphosis
humpback seen in lateral plane (SAG)
caudal regression
lower half of baby not well developed
caudal regression sono
sacrum small or absent, lower legs really small, abducted legs
caudal regression associated with
DM
sirenomella
mermaid syndrome, fusion of lower legs
sirenomella sono
oligo, legs never separate
sirenomella is thought to be
vascular in nature
sacrococcygeal teratoma
most common teratoma of neonates
sacrococcygeal teratoma sono
mass under bottom
sacrococcygeal teratoma other info:
most are benign but can be so big they cause cardiac issues
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