PIK3CA and ovarian cancer: The third dataset included 626 young women with ovarian cancer, providing data on age, nulliparity, contraceptive use, menopause, family history, full-term pregnancies, obesity, metastasis, lymph node status, PIK3CA and TP53 mutations, tumor size, lymph nodes, histology, vascular invasion, grade, adjuvant chemotherapy, radiotherapy, hormone therapy, and progression.