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). The gene discussed is CCNE1; the disease is ovarian carcinosarcoma.