We selected two different sets of fluorescent images containing captured CTCs either with human epididymis secretory protein 4 (HE4+) or without HE4 (HE4-) from 61 ovarian cancer patients 42 and epithelial (E), hybrid (H) and mesenchymal (M) CTCs from 46 pancreatic cancer patients 43. This evidence concerns the gene WFDC2 and ovarian cancer.