Breast cancer patients and survivors tend to suffer from a condition called "cancer fog"—and now a study might have uncovered the reason why. The first-of-its-kind study suggests reduced cerebrovascular function, which refers to blood flow in the brain, could explain why breast cancer survivors experience changes to the way they think, concentrate and remember information—and may also help devise new treatments for cognitive impairments. Also referred to as "chemo brain" or "brain fog," cancer fog is a common and deliberating condition that reduces cognitive function in cancer patients, believed to be due to chemotherapy. Led by Tahnee Downs, the study...