Attention deficit/hyperactivity disorder (ADHD) is a highly prevalent disorder among school age children. Once understood as a common and mild disorder restricted to childhood, ADHD is now recognized as an important condition because of its poor outcome and strong association with comorbidities. Pervasive disorders and cognitive deficits, as well as learning disorders, are complex conditions and their co-ocurrence with ADHD is commonly associated with marked impairments and disabilities. These patients need more attention and personalized treatment strategies. The aim of this article is to establish a discussion about these differential diagnoses, which are a challenge in clinical practice.
ADHD; comorbidities; diagnosis