2% of breast cancer patients are diagnosed initially with stage IV metastatic disease.
Between 6-10% of breast cancer patients are diagnosed initially with stage IV metastatic disease. This is called “de novo” metastatic breast cancer.
You can find more statistics on MBC diagnoses on the Metastatic Breast Cancer Network’s website: http://mbcn.org/incidence-and-incidence-rates/
You can learn more about de novo metastatic breast cancer here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5905205/
You can find personal stories from women diagnosed de novo on MTT here: https://metastatictrialtalk.org/2018/12/01/personal-stories-6/