Breast cysts are not a precursor to breast cancer because they can manifest as cystic hyperplasia of the breast and are prone to further development of breast cancer, but the incidence is very low. Breast cysts are benign lesions caused by ductal development, breast hyperplasia, and cystic changes in the breast follicles, and there is no clear link between them and breast cancer. Therefore, it is not very scientific to worry about breast cancer because of breast hyperplasia, cystic hyperplasia, or breast cysts. If you have breast cysts, you can go to a regular hospital for regular checkups to see if the cysts have increased in size, so you don’t need to worry too much.