STAT3 and benign neoplasm: A current systematic review and meta-analysis on 16 eligible studies involving 1747 ovarian cancer patients found that STAT3/p-STAT3 expression was upregulated in ovarian cancer samples compared to normal ovarian tissue, benign tumour, and borderline tumours (OR = 10.14, p < 0.00001; OR = 9.08, p < 0.00001; OR = 4.01, p < 0.00001) [59].