Which is worse left or right breast cancer? Breast cancer arising on the left side is biologically more aggressive and has worse outcomes compared to the right side [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P2-09-09.
Is breast cancer usually only in one breast? It can start in one or both breasts. Breast cancer cells usually form a tumor that can often be seen on a mammogram or ultrasound or felt as a lump. Breast cancer is most common in women, but men also can get breast cancer . Breast cancer cells can spread to other parts of the body and grow there, too.
Which one is the most frequent location of breast cancer? Of those who do have breast cancer, the most common location of the primary tumor is the upper outer quadrant of the breast.
Where is the first place breast cancer spreads? The lymph nodes under your arm, inside your breast, and near your collarbone are among the first places breast cancer spreads. It’s “metastatic” if it spreads beyond these small glands to other parts of your body.