CCNE1 and ovarian neoplasm: Here, our objectives were to validate previously reported associations of CCNE1 alterations with overall survival; assess correlations between CCNE1 high‐level gene amplifications, CCNE1 mRNA, and CCNE1 protein expression; and explore associations with selected biomarkers in a large cohort of HGSC samples from the international Ovarian Tumor Tissue Analysis (OTTA) consortium.