A 116-peptide biomarker panel (including identified Apolipoprotein A (APOA), β2-microglobulin, collagen fragments, fibrinogen A, Haemoglobin A, histidine-rich glycoprotein, insulin and small proline-rich protein 3) has been indicated for BC diagnosis, achieving 91% sensitivity and 68% specificity. Here, APOA1 is linked to breast cancer.