Primary mediastinal yolk sac tumor treated with platinum‐based chemotherapy and extended resection: Report of seven cases

Primary mediastinal yolk sac tumor, which is also known as endodermal sinus tumor, is a rare but lethal neoplasm, and it is a kind of mediastinal non‐seminomatous germ cell tumor. The current standard treatment in mediastinal non‐seminomatous germ cell tumors is chemotherapy combined with postchemotherapy residual mass resection. We report on seven cases of primary mediastinal yolk sac tumor treated with platinum‐based chemotherapy and extended resection