Characteristics and outcomes of rare histology TNBCs

Analysis of the National Cancer Database (2010-2016) investigated characteristics, treatment patterns, and outcomes of histologically rate (<10% of breast cancers) triple-negative breast cancer types: medullary carcinoma, adenoid cystic carcinoma, and metaplastic breast carcinoma. During the study period MedC was most common and MetC had the worst 5-year overall survival. Factors associated with a poor prognosis for MetC included advanced stage, lung metastasis, older age, and not receiving chemotherapy or radiation therapy.