Shanghai Jiao Tong University Mar 4 2026 Attention-deficit/hyperactivity disorder (ADHD) is often talked about as if it were a single condition. But anyone who works with children with ADHD-or raises one-knows that symptoms can look very different from one child to another. A new brain imaging study now provides scientific evidence for this everyday observation, showing that ADHD is not one-size-fits-all at the level of brain structure. In a recent study published in General Psychiatry ,