chapter 25 review questions
the thickness of the nuchal fold in the second trimester should not exceed
6mm
the fetal lip typically closes by
8 weeks
a cystic hygroma is the result of
An abnormal accumulation of lymphatic fluid within the soft tissue
the absence of the eyes is termed
Anophthalmia
macroglossia is most commonly found with
Beckwith-Wiedemann syndrome
a group of abnormalities associated with the entrapment of fetal parts and fetal amputations is
amniotic band syndrome
the most common cause of hypertelorism is
anterior cephalocele
the growth disorder syndrome synonymous with organ, skull, and tongue enlargement is
beckwith-wiedemann syndrome
the nuchal fold measurement is typically obtained
between 15 and 21 weeks
the measurement obtained between the lateral walls of the orbits is referred to as the
binocular diameter
which of the following is a benign congenital neck cysts found most often near the angle of the mandible
brachial cleft cyst
at what level is the nuchal fold measurement obtained
cavum septum pellucidum
close-set eyes and a nose with a single nostril is termed:
cebocephaly
an abnormal division in the lip is referred to as
cleft lip
fusion of the orbits is termed
cyclopia
a large, mostly cystic mass containing a thick midline septation is noted in the cervical spine region of a fetus. this most likely represents a
cystic hygroma
all of the following are sonographic features of holoprosencephaly except
cystic hygroma
nuchal thickening is most commonly associated with
down syndrome
there is a definite link between microtia and what syndrome
down syndrome
which of the following is also referred to as trisomy 21?
down syndrome
An oral teratoma is referred to as
epignathus
which of the following conditions does not affect the orbits?
epignathus
the condition in which there is no nose and a proboscis seperating to close-set orbits is
ethmocephaly
the isolated enlargement of the fetal thyroid is referred to as
fetal goiter
facial anomalies when discovered should prompt the sonographer to analyze the brain closely for signs of
holoprosencephaly
an increase distance between the orbits is referred to as
hypertelorism
A reduction in the distance between the orbits is referred to as:
hypotelorism
which of the following would be most difficult to detect sonographically
isolated cleft palate
an unusual protuberance of the tongue is termed
macroglossia
a small mandible is termed
micrognathia
what is the term for a smaller than normal ear
microtia
which of the following may also be referred to as turner syndrome
monosomy X
the most common location of a cystic hygroma is within the
neck
the optimal scan plane to visualize micrognathia is
sagittal
the most frequently encountered chromosomal abnormality associated with holoprosencephaly is
trisomy 13
which of the following is also referred to as patau syndrome?
trisomy 13
micrognathia is a condition found in
trisomy 18
an absent or hypoplastic nasal bone is most likely associated with
trisomy 21
an increases nuchal fold is most likely associated with
trisomy 21
which of following would most likely involve the development of a cystic hygroma?
turner syndrome
