To further investigate the role of CCNE1 in ovarian cancer subtypes, single-cell RNA-sequencing data (GSM235931) were analyzed, including samples from HGSOC, low-grade serous ovarian carcinoma (LGSOC), CCOC, endometrioid ovarian carcinoma (ENOC), and ovarian carcinosarcoma (MMMT). This evidence concerns the gene CCNE1 and carcinosarcoma.