Sally Cat’s piece fully articulates all my thinking on why PDA may not be autism at all.
It very much does seem shoehorned into autism after the removal of PDD-NOS. This was an attempt to remove different types of autism, and now we are left with a “subtype”, that doesn’t have a true diagnostic home.
It’s a frustrating home, and one I hope we can build enough research for to resolve for the next editions of the DSM and ICD.
PDA fae 
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