Jul 12, - Breast cysts are rare in women aged over 50 years. It is not clear what causes breast cysts, but they may develop in response to hormones. Oct 1, - Breast cancer symptoms in women over 50 include: A lump in the breast or underarm. Most lumps are not breast cancer, and benign breast lumps after 50 are common, but they can be cancerous, so if you find one, it's important to get it checked out. Breast pain over 50 is common and could be a symptom.