Awesome Topic.... Subtopic: Comorbid Disorders(?)
I think it's important to consider the possibility of comorbid ity in the case of ADHD & BPD in children. I recently read an article on MedScape.org called "ADHD in Children with Comorbid conditions: ADHD and Bi-Polar Disorder" .... These two disorders have symptoms that are very similar, but take on distinct patterns.
P.S. I am going through this on a personal level and this article confirmed my suspicions!