Tumours were grouped based on molecular subtype, including ERBB2 + (ER−, PR−, HER2+), triple negative (ER−, PR−, HER2−), Luminal-A (ER+ and/or PR+, HER2−), and Luminal-B (ER+ and/or PR+, HER2+). Here, ESR1 is linked to neoplasm.