Can ADHD co-occur along with PDD-NOS?

I'm 23 and I have ADHD and was just diagnosed with PDD-NOS a few days ago. I was diagnosed with ADHD and a comprehension learning disability back in 1992 or 1993 when i was 8 or 9. I had and still have poor gross and fine motor skills. I was also diagnosed with depression and GAD when I was 18 or 19. For a while now, I've been researching alot about AS and other neurological problems that can co-morbid with AS. I was for sure that I had AS, but a few days ago, i was diagnosed with PDD-NOS and not AS. How come it takes so long to diagnose PDD-NOS and Asperger's Syndrome in girls? And can ADHD co-occur along with PDD-NOS, just like it can co-occur along with AS?

The diagnostic criteria for autism spectrum disorders have a lot of overlap. The distinctions between AS, PDD-NOS, and atypical autism aren't distinct at all, and in fact the ICD-9 codes for AS and PDD-NOS are the same.

ASDs are reported far more frequently in males than females. This could reflect a genuine difference in frequency, or it could indicate a cultural bias (more males than females are thought to have ASDs, so doctors look more closely for ASDs in males than females).

Since the distinction between AS and PDD-NOS is so slight that the ICD-9 disregards it completely, it stands to reason that the correlation with ADD/ADHD is the same for both.

Depression and anxiety are very common secondary effects of ASDs for the simple reason that if you are having a hard time figuring out what comes so easily to most everyone else, self-doubt comes easily.