PDD isn't even a single disease you fuckheads. PDD is category of many different disorders, and not a diagnostic label. PDD stands for "Pervasive Developmental Disorder(s)", So it would make more since to say that yonkers has "a PDD" rather than PDD. Saying someone has PDD is like saying someone has "Personality Disorder", without specifying which disorder. It makes you sound retarded.

Things like Autism, Asperger Syndrome, and Rett syndrome used to be classified as Pervasive Development Disorders by the DSM and ICD, but the grouping has been dropped in the later additions of each respective text. Specifically, the category was used until the DSM-5 and ICD-11 came out.