Risty

If you have the 21-Hydroxylase ’variety’ of CAH, (which 90 -95% of people have) then they need to do a mutational analysis of chromosome 6, (location 6p21.3). 

If you have eg. 11 beta hydroxylase, the DNA researchers need to look at the 8th chromosome (location 8q21-22 & 8q24.3). And so on and so forth.

It’s all well documented and I’m sure the genetics lab would have all that information.

Seems strange to me - was the doctor saying that they couldn’t do it or was it the lab?