CD44(+)/CD24(-/low) cancer stem/progenitor cells are more abundant in triple-negative invasive breast carcinoma phenotype and are associated with poor outcome.

Women classified as having triple-negative tumors have a poor prognosis. The importance of CD44(+)/CD24(-/low) (stem/progenitor cell-phenotype) in breast cancer patients has also been appreciated. However, correlation between triple negativity and CD44(+)/CD24(-/low) with tumor recurrence remains elusive.