CD44 and breast cancer: Her-2 as a marker for Her-2+ breast cancer; PR, ER, CK18 (Cytokeratin 18), FoxA1 (also called HNF3α), and AGR2 (Anterior gradient 2) as markers of luminal breast cancer; CD44, Caveolin-1, Caveolin-2, EGFR, CK5 (Cytokeratin 5), and SPARC (Secreted protein acidic and cysteine-rich) as markers of BLBC were used for molecular typing.