%0 Journal Article %T Dramatic response of metaplastic breast cancer to chemo-immunotherapy %A Sylvia Adams %J Archive of "NPJ Breast Cancer". %D 2017 %R 10.1038/s41523-017-0011-0 %X Frequent overexpression of programmed death-ligand 1 has recently been demonstrated in metaplastic breast cancer, which is a rare breast cancer subtype with limited treatment options. This report describes the clinical course of a patient with metastatic metaplastic breast cancer who had a remarkable response to anti-programmed death-1 therapy with pembrolizumab in combination with nab-paclitaxel. Tissue correlates are presented including tumor-infiltrating lymphocytes and high-programmed death-ligand 1 expression in the tumor %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5445614/