Pot Pourri
Only fetal facial image required in a standard OB ultrasound (AIUM, 76805)
What is evaluation of the upper lip (coronal view)?
Disorder associated with this ultrasound finding and neonatal hypothalamic-pituitary dysfunction
What is septo-optic dysplasia?
What are the Mickey Mouse and frog-eye signs?
Given this ultrasound finding, this is the likelihood of fetal survival with normal neurodevelopment (5%)
What is > 90%?
Next ultrasound step after being called to evaluate this ultrasound finding
What is color Doppler evaluation?
Typical gestational age range during which cavum septum pellucidum can be visualized with ultrasound (+/- 1 week)
What is 17-37 weeks?
Name of autosomal recessive disorder associated with these ultrasound findings
What is Meckel Gruber Syndrome?
Anatomic correlates to the 4 lines / 3 spaces in median sagittal plane of fetal head in 1st trimester
What are the brainstem, 4th ventricle, and cisterna magna?
The incidence of this ultrasound finding in Trisomy 21 fetuses and euploid fetuses, respectively (+/- 2%)
What are 36% and 0.5%?
Next test ordered to evaluate these ultrasound findings
What is an evaluation for cytomegalovirus?
Twin proof that isolated orofacial clefting has a multifactorial etiology
What is 40-60% concordance in monozygotic twins?
Chromosomal abnormality present in 75% cases associated with this ultrasound finding
What is Trisomy 13 (Patau Syndrome)
Expansion of the 4th ventricle into the cisterna magna creates the "keyhole sign" of this embryologic process.
What is Blakes pouch cyst?
In the setting of this isolated ultrasound finding (with no other anomalies, no identified cause, and no family history), this is the risk for recurrence in the next pregnancy (+/- 2%)
What is 2-8%?
Next "genetic" test ordered to evaluate this ultrasound finding
What is an evaluation for neonatal alloimmune thrombocytopenia?
"Classic triad" of Dandy-Walker Malformation
What are (1) complete or partial agenesis of the vermis, (2) enlargement of the posterior fossa with upward displacement of the tentorium, transverse sinus, and torcular, and (3) cystic dilation of the 4th ventricle?
Name of syndrome classically associated with these ultrasound findings
What is Treacher Collins Syndrome?
Three indirect ultrasound signs prompting further evaluation for agenesis of the corpus callosum
What are (1) absent CSP, (2) colpocephaly, and (3) abnormal pattern of pericallocal artery?
Following referral from an outside facility, this is what the patient should be advised about this nonvascular finding
This is a common anatomic variant.
Next step in radiologic evaluation of this extra-axial collection of CSF