In 21-hydroxylase ... blood sample, a very high concentration of 17-hydroxyprogesterone (17-OHP), the substrate of the defective enzyme (21-OH), is diagnostic of classical 21-OHD CAH. Such tests ...

We measured plasma and urinary catecholamines and plasma metanephrines in 38 children with congenital adrenal hyperplasia due to 21-hydroxylase ... 8 a.m., samples of blood were drawn into 10 ...

If you were born with nonclassical congenital adrenal hyperplasia, your body doesn’t make enough of a certain enzyme called 21-hydroxylase ... will test for hormone levels in the blood.

A 21-hydroxylase deficiency is the most common ... A healthcare professional may conduct a hormonal exam or a blood test to diagnose the condition. Some people may wish to screen their child ...