KRT19 and cancer: Given the fact that ovarian conserving was mainly required by pre-menopausal patients, among whom type I histology accounted for the majority of cases (11), we analyzed the significance of CK19 in pre-menopausal patients with Type I cancer (n = 142) and found ovarian metastasis was higher in cases with CK19 > 3.3 ng/ml compared to those with CK19 ≤ 3.3 ng/ml (26.7 vs. 2.4%, p < 0.001).