They did find, though, that ten years after being diagnosed with breast cancer, women who had MS were 28% more likely to die of any cause than those who did not have MS.
Ruth Ann Marrie, MD, PhD, the study’s first author and the director of University of Manitoba’s MS Clinic in Winnipeg, Canada, had found in a previous Canadian population-based study that people with MS had a higher risk of being diagnosed with bladder cancer, but not for developing colorectal or breast cancer.
The study, published in the journal Neurology, was unable to adjust results for ethnicity or race, which can influence breast cancer outcomes. As such, the researchers said more studies are needed to confirm these findings in other countries, to help identify specific MS factors associated with worse outcomes.
Source: MS-UK 03 June 2021