Rare Tumor May Cause ADHD Symptoms in Some Kids

In rare cases, children diagnosed with attention deficit hyperactivity disorder (ADHD) actually have a tumor that appears to cause symptoms similar to those of ADHD, according to a small new study. The researchers evaluated 43 children with rare tumors of the adrenal gland, called pheochromocytomas and paragangliomas. They found that nine of the children (21 percent) had been diagnosed with ADHD before doctors discovered their tumors.