Cancer patients call it “chemobrain.” Writing in blogs or swapping stories in support groups, they use humor to define the foggy feeling that clamps down after chemotherapy treatments. Many wear the label proudly, putting it on stickers and T-shirts (“I’ve got chemobrain, what’s your excuse?”) They have, in effect, named their poison. Doctors disdain the term for its imprecision. But the implications are profound for cancer patients and survivors, whether they are 20-somethings who were treated for leukemia as children, or whether they are breast cancer survivors who never suspected they would have such trouble returning to their lives and their families. This blog will provide news, narratives and updates on the emerging field of chemobrain research.