Case Report: Spontaneous pregnancy after fertility-preserving treatment in a patient with low-grade endometrial stromal sarcoma and literature review. - Wang, Manrong; Wu, Pengfei; Wang, Lulu; Liu, Sijia; Gama, Qujia; Lv, Qiaoying; Zhang, Jinyu; Yu, Min; Wang, Yiqin; Ma, Fenghua; Shan, Weiwei; Luo, Xuezhen (Frontiers in Oncology, 2025)