Combination chemotherapy with sintilimab for treatment of a male patient with primary pulmonary choriocarcinoma: a case report and literature review - Liang, Xiaojing; Xu, Guoqing; Zhang, Jisong; Xu, Li; Dong, Liangliang; Wang, Xiaoyue; Han, Weidong; Chen, Enguo (Frontiers in Immunology, 2025)