Breast cancer can virtually spread to any part of the body. The most commonly affected parts are: - brain - bones - lungs - liver Reference: https://www.cancer.net/cancer-types/breast-cancer-metastatic/introduction#:~:text=Metastatic%20breast%20cancer%20may%20spread,liver%2C%20lungs%2C%20and%20brain. Image via: https://n.neurology.org/content/79/24/2366