PROM1 and ovarian carcinoma: In recent years, the onset of ovarian cancer has trended towards younger patients, and the malignancy of this cancer has also increased.1, 2 Many studies in recent years have demonstrated the presence of a subpopulation of cells in ovarian cancer tissue samples that are similar to embryonic stem cells and expresses high levels of CD44, CD133 and c‐Kit (CD117) markers.