CASE 48
History: A patient presents for a routine 20-week ultrasound scan.
1. Figures A and B are from the same fetus. What should be included in the differential diagnosis? (Choose all that apply.)
A. Varix of the umbilical vein
B. Persistent intrahepatic right portal vein rather than left portal vein
C. Omphalocele
2. Which of the following is not associated with a single umbilical artery?
A. Sirenomelia
B. Intrauterine growth restriction
3. Which of the following statements concerning the umbilical artery is false?
A. There are usually two arteries and one vein.
D. The umbilical vein is larger in diameter than the umbilical artery.
4. Which of the following is not