Considering the rounded collagen invasive phenotype of OCKI_p03 and OCKI_p06 cells, resembling the reported EphA2‐dependent breast cancer cell phenotypes (Sugiyama et al, 2013), and EphA2 association with OC clinical outcome (Thaker et al, 2004), we analyzed EphA2 in these ex vivo cultures by immunofluorescence. Here, EPHA2 is linked to breast cancer.