Estrogen Receptor-negative Ductal Carcinoma (DCIS) of the Breast - an Institutional Review of Outcomes.

Background/aim: Estrogen receptor (ER)-negative [ER(-)] invasive breast cancers (IBCs) are known to be more aggressive than their ER(+) counterparts. This is less well defined for ductal carcinoma in situ (DCIS). This study investigated the outcomes following the treatment of ER(-) DCIS.