Which of the following tests on maternal serum is most useful in distinguishing between open neural tube defects and ventral wall defects in a fetus?
In patients with elevated amniotic fluid AFP to differentiate between NTD and abdominal wall defect, acetylcholinesterase and pseudocholinesterase are measured:
Carcinoembryogenic antigen
Sphingomyelin
Alpha-feto protein
Pseudocholinesterase