Carol M.Hi Susan,
Not sure if this is your question, but to convert from ng/ml to ng/dl, you just multiply by 100. So, this would make the 2.1 DHEA value equal to 210 ng/dl and the 0.9 androstenedione value equal to 90 ng/dl.
Compared to published values from Esoterix lab (which is where the values from the CARES article are also taken from), this means your son’s 17-ohp numbers are within normal limits (similar to people who don’t have CAH); his testosterone value is also within normal limits; one of his DHEA numbers is slightly elevated for age, while the other is normal; and both androstenedione numbers are slightly elevated for age.
Given the low 17-ohp number and more-or-less normal androgens, I can see why your endo does not see a whole lot of reason to suspect CAH. At any rate, the picture should be clearer after you get the results back from the stim test.
The only p. s. I would like to add to the above is to check the reference ranges given by the lab that actually did the tests. I am confused what the "0.1-3.0" normal range that you gave above refers to?