A Newborn Screening Test Using a Dried Blood Spot Is

Multiple Choice

A newborn screening test using a dried blood spot is positive for congenital adrenal hyperplasia (CAH) .What laboratory testing would be done next?

A) No next step as this test is the confirmatory analysis
B) DNA analysis of genetic mutation
C) A stimulating hormone test
D) A second-tier test for CAH,such as an MS/MS steroid profile