Read in child health magazine about cushing syndrome. I would like to know more. How do I find out?

Many options. Your doctor is a good source for information. Respectable internet sites also a good source. Here is one: http://www.Uptodate.Com/contents/patient-information-cushings-syndrome-beyond-the-basics.
Detailed information. Here's a detailed (and free) scientific article - perhaps more than you want to know: http://www.Ncbi.Nlm.Nih.Gov/pmc/articles/pmc2963160/?Tool=pubmed.