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All of the following are associated with spina bifida
except:
a. Splaying of the laminae
b. Enlarged posterior fossa
c. Lemon sign
d. Hydrocephalus

The thalamic tissue located within the third ventricle of
the brain that can become enlarged with Arnold–Chiari II malformation is:
a. Corpus callosum
b. Cerebellar vermis
c. Cavum septum pellucidum
d. Massa intermedia

pon sonographic interrogation of a 28-week pregnancy, you
note that when pressure is applied to the fetal skull, the skull can be easily
distorted. This is sonographic evidence of:
a. Arnold–Chiari II malformation
b. Achondroplasia
c. Thanatophoric dysplasia
d. Osteogenesis imperfecta

A bell-shaped chest and multiple fetal fractures are
indicative of:
a. Thanatophoric dysplasia
b. Caudal regression syndrome
c. Achondrogenesis
d. Osteogenesis imperfecta

All of the following are signs of Arnold–Chiari II syndrome
except:
a. S-shaped spine
b. Banana sign
c. Lemon sign
d. Colpocephaly

All of the following are associated with amniotic band
syndrome except:
a. Amputation of fetal parts
b. Anencephaly
c. Facial clefting
d. Synechiae

Sonographically, you visualize a mass extending from the
distal spine of a fetus. This mass could be all of the following except:
a. Sacrococcygeal teratoma
b. Meningocele
c. Meningomyelocele
d. Phocomeningocele

A protein produced by the yolk sac and fetal liver that is
found in excess in the maternal circulation in the presence of a neural tube
defect is:
a. PAPP-A
b. hCG
c. Estriol
d. AFP