Researchers have discovered a new link between Alzheimer’s disease and mild cognitive impairment, a condition that often leads to the brain disorder, CNN reports. In a neuroimaging study, more than half of MCI patients showed brain atrophy similar to those with Alzheimer’s; indeed, a year later, 29% of the MCI patients with Alzheimer’s-like scans developed the disease. The other MCI patients were far less likely to see their condition deteriorate. (More Alzheimer's disease stories.)