Cell surface precursor N-cadherin is expressed on chemo-residual tumor cells from TNBC patients, suggesting the importance of investigating: 1) whether cell surface pro-N-cadherin in TN tumor cells predicts future tumor recurrence, and 2) if this cell surface protein can be targeted to eliminate chemo-residual TNBC disease/prevent recurrence. Here, CDH2 is linked to neoplasm.