List Of Benign Tumor In Breast 2023. These are benign breast tumors that often feel like hard, round lumps that move easily and are common in women under age 30. Web a breast lump is a mass or growth that develops in your breast.

But it can be found at any age in anyone who has periods. It is also known as fibroadenosis. An increase in the lump size may occur just prior to onset of periods.