Breast-conserving therapy shows better prognosis in mucinous breast carcinoma compared with mastectomy: A SEER population-based study.

This large population-based study indicated patients who received BCT had better prognosis than those received mastectomy in T1-2 stage MBC, especially in patients at the age of 50-79 years. The use of radiotherapy showed OS benefit in patients receiving BCT. Breast-conserving therapy might be preferred over mastectomy especially in locoregional treatment of T1-2 stage MBC.