Collecting, Analyzing, and Storing Samples From Patients With Metastatic, Triple Negative Breast Cancer Receiving Anti-cancer Therapy

This pilot research trial studies collecting, analyzing, and storing samples from patients with triple negative breast cancer (breast cancer cells that do not have estrogen receptors, progesterone receptors, or large amounts of human epidermal growth factor receptor 2 protein) that has spread to other places in the body receiving anti-cancer therapy. Studying samples of tissue, blood, buccal swab, saliva, and urine in the laboratory from patients receiving anti-cancer therapy may help doctors learn more about changes that occur in deoxyribonucleic acid (DNA) and identify biomarkers related to cancer.