Hi Maria,

As I understand it, Late Onset CAH is a mild 21-hydroxylase deficiency.  It can be a bit confusing because of the child’s ability to produce normal levels of cortisol and aldosterone, but still results in rapid growth and masculinization in girls if left untreated.

 

You can find a little more information on the following site:

http://www.hopkinsmedicine.org/pediatricendocrinology/cah/cah3.html

 

Hope this helps.