An article in News Medical reports on the intriguing possibility that childhood ADHD and adult ADHD are two distinct and unrelated disorders. A recent study found that very few people who had received a diagnosis of ADHD in childhood retained the diagnosis in adulthood. Conversely, people with adult ADHD diagnoses had no clear signs of the disorder in childhood. Also, people diagnosed with childhood ADHD had cognitive deficits consistent with ADHD as a neurodevelopmental disorder that lasted into adulthood. People with adult ADHD displayed significantly fewer cognitive deficits. If adult and childhood ADHD prove to be distinct disorders clinicians will have to re-evaluate how they diagnose and treat adult ADHD.  To read this article in its entirety, click here.