Aberrant genes are a link between endometriosis and ovarian cancer; multipotent stem/progenitor cells show aberrant expression of genes such as KiT, HIF2 (hypoxia-inducible factor 2), and E-cadherin, and downregulation of the tumor-suppressor genes PTEN and ARID1A [106]. This evidence concerns the gene CDH1 and endometriosis.