CHICAGO (EGMN) - Circulating tumor necrosis factor appears to play a role in the cognitive dysfunction called "chemo brain" that some women experience after receiving chemotherapy as part of their primary treatment for newly diagnosed breast cancer.Preliminary data on 93 women in a prospective observational cohort study show that women who underwent chemotherapy had higher levels of circulating tumor necrosis factor (TNF) than did similar women who had not received chemotherapy as part of their primary...