Compared with NOE (n=3), the proportion of tumor biomarker PAX8, P53, CA125 and CK7- or CD44-positive cells was significantly higher in HGSOC than in NOE, while the level of tumor biomarker WT1 was higher in HGSOC than in NOE without statistical significance (Supplementary Figure S2B,Supplementary Table S4). Here, CD44 is linked to neoplasm.